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Finding the Fourth Proportional to 14,991.20, 22,443.60 and 9,159.20

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Solution

The fourth proportional to 14,991.20, 22,443.60 and 9,159.20 is: 13,712.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.20 : 22,443.60 = 9,159.20 : x
  2. Step 2: Convert to fraction form
    14,991.20/22,443.60 = 9,159.20/x
  3. Step 3: Cross multiply
    14,991.20x = 22,443.60 × 9,159.20
  4. Step 4: Simplify right side
    14,991.20x = 205,565,421.12
  5. Step 5: Solve for x
    x = 205,565,421.12/14,991.20
  6. Step 6: Final answer
    x = 13,712.41

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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.