Home / 18,272.28-25,215.75-9,888.78

Finding the Fourth Proportional to 18,272.28, 25,215.75 and 9,888.78

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Solution

The fourth proportional to 18,272.28, 25,215.75 and 9,888.78 is: 13,646.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,272.28 : 25,215.75 = 9,888.78 : x
  2. Step 2: Convert to fraction form
    18,272.28/25,215.75 = 9,888.78/x
  3. Step 3: Cross multiply
    18,272.28x = 25,215.75 × 9,888.78
  4. Step 4: Simplify right side
    18,272.28x = 249,353,035.80
  5. Step 5: Solve for x
    x = 249,353,035.80/18,272.28
  6. Step 6: Final answer
    x = 13,646.52

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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.