Home / 20,547.38-28,355.37-11,115.95

Finding the Fourth Proportional to 20,547.38, 28,355.37 and 11,115.95

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Solution

The fourth proportional to 20,547.38, 28,355.37 and 11,115.95 is: 15,340.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.38 : 28,355.37 = 11,115.95 : x
  2. Step 2: Convert to fraction form
    20,547.38/28,355.37 = 11,115.95/x
  3. Step 3: Cross multiply
    20,547.38x = 28,355.37 × 11,115.95
  4. Step 4: Simplify right side
    20,547.38x = 315,196,875.15
  5. Step 5: Solve for x
    x = 315,196,875.15/20,547.38
  6. Step 6: Final answer
    x = 15,340.00

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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.