Home / 28,463.79-39,280.14-15,716.76

Finding the Fourth Proportional to 28,463.79, 39,280.14 and 15,716.76

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Solution

The fourth proportional to 28,463.79, 39,280.14 and 15,716.76 is: 21,689.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,463.79 : 39,280.14 = 15,716.76 : x
  2. Step 2: Convert to fraction form
    28,463.79/39,280.14 = 15,716.76/x
  3. Step 3: Cross multiply
    28,463.79x = 39,280.14 × 15,716.76
  4. Step 4: Simplify right side
    28,463.79x = 617,356,533.15
  5. Step 5: Solve for x
    x = 617,356,533.15/28,463.79
  6. Step 6: Final answer
    x = 21,689.19

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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.