Home / 27,875.18-38,467.65-15,128.42

Finding the Fourth Proportional to 27,875.18, 38,467.65 and 15,128.42

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Solution

The fourth proportional to 27,875.18, 38,467.65 and 15,128.42 is: 20,877.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,875.18 : 38,467.65 = 15,128.42 : x
  2. Step 2: Convert to fraction form
    27,875.18/38,467.65 = 15,128.42/x
  3. Step 3: Cross multiply
    27,875.18x = 38,467.65 × 15,128.42
  4. Step 4: Simplify right side
    27,875.18x = 581,954,765.61
  5. Step 5: Solve for x
    x = 581,954,765.61/27,875.18
  6. Step 6: Final answer
    x = 20,877.17

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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.