Home / 28,389.38-39,182.01-15,818.18

Finding the Fourth Proportional to 28,389.38, 39,182.01 and 15,818.18

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Solution

The fourth proportional to 28,389.38, 39,182.01 and 15,818.18 is: 21,831.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,389.38 : 39,182.01 = 15,818.18 : x
  2. Step 2: Convert to fraction form
    28,389.38/39,182.01 = 15,818.18/x
  3. Step 3: Cross multiply
    28,389.38x = 39,182.01 × 15,818.18
  4. Step 4: Simplify right side
    28,389.38x = 619,788,086.94
  5. Step 5: Solve for x
    x = 619,788,086.94/28,389.38
  6. Step 6: Final answer
    x = 21,831.69

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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.