Home / 27,639.18-38,142.20-15,703.17

Finding the Fourth Proportional to 27,639.18, 38,142.20 and 15,703.17

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Solution

The fourth proportional to 27,639.18, 38,142.20 and 15,703.17 is: 21,670.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,639.18 : 38,142.20 = 15,703.17 : x
  2. Step 2: Convert to fraction form
    27,639.18/38,142.20 = 15,703.17/x
  3. Step 3: Cross multiply
    27,639.18x = 38,142.20 × 15,703.17
  4. Step 4: Simplify right side
    27,639.18x = 598,953,372.26
  5. Step 5: Solve for x
    x = 598,953,372.26/27,639.18
  6. Step 6: Final answer
    x = 21,670.45

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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.