Home / 18,699.12-28,056.96-9,931.92

Finding the Fourth Proportional to 18,699.12, 28,056.96 and 9,931.92

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Solution

The fourth proportional to 18,699.12, 28,056.96 and 9,931.92 is: 14,902.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.12 : 28,056.96 = 9,931.92 : x
  2. Step 2: Convert to fraction form
    18,699.12/28,056.96 = 9,931.92/x
  3. Step 3: Cross multiply
    18,699.12x = 28,056.96 × 9,931.92
  4. Step 4: Simplify right side
    18,699.12x = 278,659,482.16
  5. Step 5: Solve for x
    x = 278,659,482.16/18,699.12
  6. Step 6: Final answer
    x = 14,902.28

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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.