Home / 28,421.04-39,220.12-15,674.76

Finding the Fourth Proportional to 28,421.04, 39,220.12 and 15,674.76

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Solution

The fourth proportional to 28,421.04, 39,220.12 and 15,674.76 is: 21,630.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.04 : 39,220.12 = 15,674.76 : x
  2. Step 2: Convert to fraction form
    28,421.04/39,220.12 = 15,674.76/x
  3. Step 3: Cross multiply
    28,421.04x = 39,220.12 × 15,674.76
  4. Step 4: Simplify right side
    28,421.04x = 614,765,968.17
  5. Step 5: Solve for x
    x = 614,765,968.17/28,421.04
  6. Step 6: Final answer
    x = 21,630.66

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Double scale
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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.