Home / 14,748.40-20,351.28-8,780.32

Finding the Fourth Proportional to 14,748.40, 20,351.28 and 8,780.32

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Solution

The fourth proportional to 14,748.40, 20,351.28 and 8,780.32 is: 12,115.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,748.40 : 20,351.28 = 8,780.32 : x
  2. Step 2: Convert to fraction form
    14,748.40/20,351.28 = 8,780.32/x
  3. Step 3: Cross multiply
    14,748.40x = 20,351.28 × 8,780.32
  4. Step 4: Simplify right side
    14,748.40x = 178,690,750.81
  5. Step 5: Solve for x
    x = 178,690,750.81/14,748.40
  6. Step 6: Final answer
    x = 12,115.94

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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.