Home / 42,221.28-63,349.35-18,516.55

Finding the Fourth Proportional to 42,221.28, 63,349.35 and 18,516.55

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Solution

The fourth proportional to 42,221.28, 63,349.35 and 18,516.55 is: 27,782.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,221.28 : 63,349.35 = 18,516.55 : x
  2. Step 2: Convert to fraction form
    42,221.28/63,349.35 = 18,516.55/x
  3. Step 3: Cross multiply
    42,221.28x = 63,349.35 × 18,516.55
  4. Step 4: Simplify right side
    42,221.28x = 1,173,011,406.74
  5. Step 5: Solve for x
    x = 1,173,011,406.74/42,221.28
  6. Step 6: Final answer
    x = 27,782.47

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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.