Home / 51,358.20-70,870.28-28,387.05

Finding the Fourth Proportional to 51,358.20, 70,870.28 and 28,387.05

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Solution

The fourth proportional to 51,358.20, 70,870.28 and 28,387.05 is: 39,171.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,358.20 : 70,870.28 = 28,387.05 : x
  2. Step 2: Convert to fraction form
    51,358.20/70,870.28 = 28,387.05/x
  3. Step 3: Cross multiply
    51,358.20x = 70,870.28 × 28,387.05
  4. Step 4: Simplify right side
    51,358.20x = 2,011,798,217.11
  5. Step 5: Solve for x
    x = 2,011,798,217.11/51,358.20
  6. Step 6: Final answer
    x = 39,171.90

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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.