Home / 28,153.74-38,851.56-15,406.88

Finding the Fourth Proportional to 28,153.74, 38,851.56 and 15,406.88

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Solution

The fourth proportional to 28,153.74, 38,851.56 and 15,406.88 is: 21,261.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,153.74 : 38,851.56 = 15,406.88 : x
  2. Step 2: Convert to fraction form
    28,153.74/38,851.56 = 15,406.88/x
  3. Step 3: Cross multiply
    28,153.74x = 38,851.56 × 15,406.88
  4. Step 4: Simplify right side
    28,153.74x = 598,581,128.48
  5. Step 5: Solve for x
    x = 598,581,128.48/28,153.74
  6. Step 6: Final answer
    x = 21,261.16

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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.