Home / 20,808.90-28,716.29-11,377.47

Finding the Fourth Proportional to 20,808.90, 28,716.29 and 11,377.47

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Solution

The fourth proportional to 20,808.90, 28,716.29 and 11,377.47 is: 15,700.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.90 : 28,716.29 = 11,377.47 : x
  2. Step 2: Convert to fraction form
    20,808.90/28,716.29 = 11,377.47/x
  3. Step 3: Cross multiply
    20,808.90x = 28,716.29 × 11,377.47
  4. Step 4: Simplify right side
    20,808.90x = 326,718,547.16
  5. Step 5: Solve for x
    x = 326,718,547.16/20,808.90
  6. Step 6: Final answer
    x = 15,700.90

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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.