Home / 20,890.64-31,261.10-18,089.13

Finding the Fourth Proportional to 20,890.64, 31,261.10 and 18,089.13

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Solution

The fourth proportional to 20,890.64, 31,261.10 and 18,089.13 is: 27,068.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.64 : 31,261.10 = 18,089.13 : x
  2. Step 2: Convert to fraction form
    20,890.64/31,261.10 = 18,089.13/x
  3. Step 3: Cross multiply
    20,890.64x = 31,261.10 × 18,089.13
  4. Step 4: Simplify right side
    20,890.64x = 565,486,011.40
  5. Step 5: Solve for x
    x = 565,486,011.40/20,890.64
  6. Step 6: Final answer
    x = 27,068.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.