Home / 20,547.90-28,356.18-11,116.47

Finding the Fourth Proportional to 20,547.90, 28,356.18 and 11,116.47

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Solution

The fourth proportional to 20,547.90, 28,356.18 and 11,116.47 is: 15,340.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.90 : 28,356.18 = 11,116.47 : x
  2. Step 2: Convert to fraction form
    20,547.90/28,356.18 = 11,116.47/x
  3. Step 3: Cross multiply
    20,547.90x = 28,356.18 × 11,116.47
  4. Step 4: Simplify right side
    20,547.90x = 315,220,624.28
  5. Step 5: Solve for x
    x = 315,220,624.28/20,547.90
  6. Step 6: Final answer
    x = 15,340.77

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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.