Home / 28,101.28-38,778.56-15,525.76

Finding the Fourth Proportional to 28,101.28, 38,778.56 and 15,525.76

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Solution

The fourth proportional to 28,101.28, 38,778.56 and 15,525.76 is: 21,424.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,101.28 : 38,778.56 = 15,525.76 : x
  2. Step 2: Convert to fraction form
    28,101.28/38,778.56 = 15,525.76/x
  3. Step 3: Cross multiply
    28,101.28x = 38,778.56 × 15,525.76
  4. Step 4: Simplify right side
    28,101.28x = 602,066,615.71
  5. Step 5: Solve for x
    x = 602,066,615.71/28,101.28
  6. Step 6: Final answer
    x = 21,424.88

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Half scale
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Double scale
Find fourth proportional to 28,102.28, 38,779.94 and 15,526.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.