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Finding the Fourth Proportional to 56,495.70, 84,777.15 and 21,438.90

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Solution

The fourth proportional to 56,495.70, 84,777.15 and 21,438.90 is: 32,171.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,495.70 : 84,777.15 = 21,438.90 : x
  2. Step 2: Convert to fraction form
    56,495.70/84,777.15 = 21,438.90/x
  3. Step 3: Cross multiply
    56,495.70x = 84,777.15 × 21,438.90
  4. Step 4: Simplify right side
    56,495.70x = 1,817,528,841.14
  5. Step 5: Solve for x
    x = 1,817,528,841.14/56,495.70
  6. Step 6: Final answer
    x = 32,171.10

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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.