Home / 20,715.43-28,587.30-11,284.00

Finding the Fourth Proportional to 20,715.43, 28,587.30 and 11,284.00

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Solution

The fourth proportional to 20,715.43, 28,587.30 and 11,284.00 is: 15,571.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.43 : 28,587.30 = 11,284.00 : x
  2. Step 2: Convert to fraction form
    20,715.43/28,587.30 = 11,284.00/x
  3. Step 3: Cross multiply
    20,715.43x = 28,587.30 × 11,284.00
  4. Step 4: Simplify right side
    20,715.43x = 322,579,034.42
  5. Step 5: Solve for x
    x = 322,579,034.42/20,715.43
  6. Step 6: Final answer
    x = 15,571.92

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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.