Home / 12,915.48-17,831.92-9,925.80

Finding the Fourth Proportional to 12,915.48, 17,831.92 and 9,925.80

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Solution

The fourth proportional to 12,915.48, 17,831.92 and 9,925.80 is: 13,704.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.48 : 17,831.92 = 9,925.80 : x
  2. Step 2: Convert to fraction form
    12,915.48/17,831.92 = 9,925.80/x
  3. Step 3: Cross multiply
    12,915.48x = 17,831.92 × 9,925.80
  4. Step 4: Simplify right side
    12,915.48x = 176,996,071.54
  5. Step 5: Solve for x
    x = 176,996,071.54/12,915.48
  6. Step 6: Final answer
    x = 13,704.18

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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.