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Finding the Fourth Proportional to 28,539.40, 42,815.24 and 14,501.40

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Solution

The fourth proportional to 28,539.40, 42,815.24 and 14,501.40 is: 21,755.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,539.40 : 42,815.24 = 14,501.40 : x
  2. Step 2: Convert to fraction form
    28,539.40/42,815.24 = 14,501.40/x
  3. Step 3: Cross multiply
    28,539.40x = 42,815.24 × 14,501.40
  4. Step 4: Simplify right side
    28,539.40x = 620,880,921.34
  5. Step 5: Solve for x
    x = 620,880,921.34/28,539.40
  6. Step 6: Final answer
    x = 21,755.22

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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.