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Finding the Fourth Proportional to 28,988.80, 43,432.80 and 13,374.40

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Solution

The fourth proportional to 28,988.80, 43,432.80 and 13,374.40 is: 20,038.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,988.80 : 43,432.80 = 13,374.40 : x
  2. Step 2: Convert to fraction form
    28,988.80/43,432.80 = 13,374.40/x
  3. Step 3: Cross multiply
    28,988.80x = 43,432.80 × 13,374.40
  4. Step 4: Simplify right side
    28,988.80x = 580,887,640.32
  5. Step 5: Solve for x
    x = 580,887,640.32/28,988.80
  6. Step 6: Final answer
    x = 20,038.35

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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.