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Finding the Fourth Proportional to 18,002.32, 26,991.70 and 8,642.08

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Solution

The fourth proportional to 18,002.32, 26,991.70 and 8,642.08 is: 12,957.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,002.32 : 26,991.70 = 8,642.08 : x
  2. Step 2: Convert to fraction form
    18,002.32/26,991.70 = 8,642.08/x
  3. Step 3: Cross multiply
    18,002.32x = 26,991.70 × 8,642.08
  4. Step 4: Simplify right side
    18,002.32x = 233,264,430.74
  5. Step 5: Solve for x
    x = 233,264,430.74/18,002.32
  6. Step 6: Final answer
    x = 12,957.46

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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.