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Finding the Fourth Proportional to 58,428.92, 87,648.24 and 18,985.16

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Solution

The fourth proportional to 58,428.92, 87,648.24 and 18,985.16 is: 28,479.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,428.92 : 87,648.24 = 18,985.16 : x
  2. Step 2: Convert to fraction form
    58,428.92/87,648.24 = 18,985.16/x
  3. Step 3: Cross multiply
    58,428.92x = 87,648.24 × 18,985.16
  4. Step 4: Simplify right side
    58,428.92x = 1,664,015,860.12
  5. Step 5: Solve for x
    x = 1,664,015,860.12/58,428.92
  6. Step 6: Final answer
    x = 28,479.32

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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.