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Finding the Fourth Proportional to 28,374.90, 42,569.09 and 8,652.21

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Solution

The fourth proportional to 28,374.90, 42,569.09 and 8,652.21 is: 12,980.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,374.90 : 42,569.09 = 8,652.21 : x
  2. Step 2: Convert to fraction form
    28,374.90/42,569.09 = 8,652.21/x
  3. Step 3: Cross multiply
    28,374.90x = 42,569.09 × 8,652.21
  4. Step 4: Simplify right side
    28,374.90x = 368,316,706.19
  5. Step 5: Solve for x
    x = 368,316,706.19/28,374.90
  6. Step 6: Final answer
    x = 12,980.37

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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.