Home / 15,818.98-21,831.79-9,104.89

Finding the Fourth Proportional to 15,818.98, 21,831.79 and 9,104.89

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Solution

The fourth proportional to 15,818.98, 21,831.79 and 9,104.89 is: 12,565.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,818.98 : 21,831.79 = 9,104.89 : x
  2. Step 2: Convert to fraction form
    15,818.98/21,831.79 = 9,104.89/x
  3. Step 3: Cross multiply
    15,818.98x = 21,831.79 × 9,104.89
  4. Step 4: Simplify right side
    15,818.98x = 198,776,046.45
  5. Step 5: Solve for x
    x = 198,776,046.45/15,818.98
  6. Step 6: Final answer
    x = 12,565.67

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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.