Home / 18,931.37-28,397.46-4,891.70

Finding the Fourth Proportional to 18,931.37, 28,397.46 and 4,891.70

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Solution

The fourth proportional to 18,931.37, 28,397.46 and 4,891.70 is: 7,337.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.37 : 28,397.46 = 4,891.70 : x
  2. Step 2: Convert to fraction form
    18,931.37/28,397.46 = 4,891.70/x
  3. Step 3: Cross multiply
    18,931.37x = 28,397.46 × 4,891.70
  4. Step 4: Simplify right side
    18,931.37x = 138,911,855.08
  5. Step 5: Solve for x
    x = 138,911,855.08/18,931.37
  6. Step 6: Final answer
    x = 7,337.65

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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.