Home / 20,298.29-28,011.56-11,345.78

Finding the Fourth Proportional to 20,298.29, 28,011.56 and 11,345.78

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Solution

The fourth proportional to 20,298.29, 28,011.56 and 11,345.78 is: 15,657.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,298.29 : 28,011.56 = 11,345.78 : x
  2. Step 2: Convert to fraction form
    20,298.29/28,011.56 = 11,345.78/x
  3. Step 3: Cross multiply
    20,298.29x = 28,011.56 × 11,345.78
  4. Step 4: Simplify right side
    20,298.29x = 317,812,800.43
  5. Step 5: Solve for x
    x = 317,812,800.43/20,298.29
  6. Step 6: Final answer
    x = 15,657.13

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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.