Home / 27,639.13-38,143.34-15,543.42

Finding the Fourth Proportional to 27,639.13, 38,143.34 and 15,543.42

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Solution

The fourth proportional to 27,639.13, 38,143.34 and 15,543.42 is: 21,450.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,639.13 : 38,143.34 = 15,543.42 : x
  2. Step 2: Convert to fraction form
    27,639.13/38,143.34 = 15,543.42/x
  3. Step 3: Cross multiply
    27,639.13x = 38,143.34 × 15,543.42
  4. Step 4: Simplify right side
    27,639.13x = 592,877,992.68
  5. Step 5: Solve for x
    x = 592,877,992.68/27,639.13
  6. Step 6: Final answer
    x = 21,450.68

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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.