Home / 20,700.90-28,566.79-12,088.56

Finding the Fourth Proportional to 20,700.90, 28,566.79 and 12,088.56

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Solution

The fourth proportional to 20,700.90, 28,566.79 and 12,088.56 is: 16,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.90 : 28,566.79 = 12,088.56 : x
  2. Step 2: Convert to fraction form
    20,700.90/28,566.79 = 12,088.56/x
  3. Step 3: Cross multiply
    20,700.90x = 28,566.79 × 12,088.56
  4. Step 4: Simplify right side
    20,700.90x = 345,331,426.34
  5. Step 5: Solve for x
    x = 345,331,426.34/20,700.90
  6. Step 6: Final answer
    x = 16,681.95

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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.