Home / 18,740.64-28,123.74-9,981.72

Finding the Fourth Proportional to 18,740.64, 28,123.74 and 9,981.72

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Solution

The fourth proportional to 18,740.64, 28,123.74 and 9,981.72 is: 14,979.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,740.64 : 28,123.74 = 9,981.72 : x
  2. Step 2: Convert to fraction form
    18,740.64/28,123.74 = 9,981.72/x
  3. Step 3: Cross multiply
    18,740.64x = 28,123.74 × 9,981.72
  4. Step 4: Simplify right side
    18,740.64x = 280,723,298.03
  5. Step 5: Solve for x
    x = 280,723,298.03/18,740.64
  6. Step 6: Final answer
    x = 14,979.39

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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.