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Finding the Fourth Proportional to 18,363.84, 25,319.70 and 15,526.32

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Solution

The fourth proportional to 18,363.84, 25,319.70 and 15,526.32 is: 21,407.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,363.84 : 25,319.70 = 15,526.32 : x
  2. Step 2: Convert to fraction form
    18,363.84/25,319.70 = 15,526.32/x
  3. Step 3: Cross multiply
    18,363.84x = 25,319.70 × 15,526.32
  4. Step 4: Simplify right side
    18,363.84x = 393,121,764.50
  5. Step 5: Solve for x
    x = 393,121,764.50/18,363.84
  6. Step 6: Final answer
    x = 21,407.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.