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Finding the Fourth Proportional to 28,289.00, 42,438.08 and 9,570.15

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Solution

The fourth proportional to 28,289.00, 42,438.08 and 9,570.15 is: 14,356.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.00 : 42,438.08 = 9,570.15 : x
  2. Step 2: Convert to fraction form
    28,289.00/42,438.08 = 9,570.15/x
  3. Step 3: Cross multiply
    28,289.00x = 42,438.08 × 9,570.15
  4. Step 4: Simplify right side
    28,289.00x = 406,138,761.41
  5. Step 5: Solve for x
    x = 406,138,761.41/28,289.00
  6. Step 6: Final answer
    x = 14,356.77

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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.