Home / 18,747.20-28,088.40-8,865.20

Finding the Fourth Proportional to 18,747.20, 28,088.40 and 8,865.20

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Solution

The fourth proportional to 18,747.20, 28,088.40 and 8,865.20 is: 13,282.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.20 : 28,088.40 = 8,865.20 : x
  2. Step 2: Convert to fraction form
    18,747.20/28,088.40 = 8,865.20/x
  3. Step 3: Cross multiply
    18,747.20x = 28,088.40 × 8,865.20
  4. Step 4: Simplify right side
    18,747.20x = 249,009,283.68
  5. Step 5: Solve for x
    x = 249,009,283.68/18,747.20
  6. Step 6: Final answer
    x = 13,282.48

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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.