Home / 18,871.04-28,306.56-8,470.64

Finding the Fourth Proportional to 18,871.04, 28,306.56 and 8,470.64

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Solution

The fourth proportional to 18,871.04, 28,306.56 and 8,470.64 is: 12,705.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.04 : 28,306.56 = 8,470.64 : x
  2. Step 2: Convert to fraction form
    18,871.04/28,306.56 = 8,470.64/x
  3. Step 3: Cross multiply
    18,871.04x = 28,306.56 × 8,470.64
  4. Step 4: Simplify right side
    18,871.04x = 239,774,679.40
  5. Step 5: Solve for x
    x = 239,774,679.40/18,871.04
  6. Step 6: Final answer
    x = 12,705.96

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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.