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Finding the Fourth Proportional to 56,438.88, 84,670.32 and 21,377.76

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Solution

The fourth proportional to 56,438.88, 84,670.32 and 21,377.76 is: 32,071.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,438.88 : 84,670.32 = 21,377.76 : x
  2. Step 2: Convert to fraction form
    56,438.88/84,670.32 = 21,377.76/x
  3. Step 3: Cross multiply
    56,438.88x = 84,670.32 × 21,377.76
  4. Step 4: Simplify right side
    56,438.88x = 1,810,061,780.08
  5. Step 5: Solve for x
    x = 1,810,061,780.08/56,438.88
  6. Step 6: Final answer
    x = 32,071.19

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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.