Home / 28,001.40-42,001.20-9,282.30

Finding the Fourth Proportional to 28,001.40, 42,001.20 and 9,282.30

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Solution

The fourth proportional to 28,001.40, 42,001.20 and 9,282.30 is: 13,923.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,001.40 : 42,001.20 = 9,282.30 : x
  2. Step 2: Convert to fraction form
    28,001.40/42,001.20 = 9,282.30/x
  3. Step 3: Cross multiply
    28,001.40x = 42,001.20 × 9,282.30
  4. Step 4: Simplify right side
    28,001.40x = 389,867,738.76
  5. Step 5: Solve for x
    x = 389,867,738.76/28,001.40
  6. Step 6: Final answer
    x = 13,923.15

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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.