Home / 15,781.02-21,771.19-11,068.38

Finding the Fourth Proportional to 15,781.02, 21,771.19 and 11,068.38

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Solution

The fourth proportional to 15,781.02, 21,771.19 and 11,068.38 is: 15,269.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.02 : 21,771.19 = 11,068.38 : x
  2. Step 2: Convert to fraction form
    15,781.02/21,771.19 = 11,068.38/x
  3. Step 3: Cross multiply
    15,781.02x = 21,771.19 × 11,068.38
  4. Step 4: Simplify right side
    15,781.02x = 240,971,803.97
  5. Step 5: Solve for x
    x = 240,971,803.97/15,781.02
  6. Step 6: Final answer
    x = 15,269.72

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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.