Home / 18,957.29-28,439.31-6,478.70

Finding the Fourth Proportional to 18,957.29, 28,439.31 and 6,478.70

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Solution

The fourth proportional to 18,957.29, 28,439.31 and 6,478.70 is: 9,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,957.29 : 28,439.31 = 6,478.70 : x
  2. Step 2: Convert to fraction form
    18,957.29/28,439.31 = 6,478.70/x
  3. Step 3: Cross multiply
    18,957.29x = 28,439.31 × 6,478.70
  4. Step 4: Simplify right side
    18,957.29x = 184,249,757.70
  5. Step 5: Solve for x
    x = 184,249,757.70/18,957.29
  6. Step 6: Final answer
    x = 9,719.20

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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.