Home / 15,928.39-21,981.18-8,854.84

Finding the Fourth Proportional to 15,928.39, 21,981.18 and 8,854.84

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Solution

The fourth proportional to 15,928.39, 21,981.18 and 8,854.84 is: 12,219.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.39 : 21,981.18 = 8,854.84 : x
  2. Step 2: Convert to fraction form
    15,928.39/21,981.18 = 8,854.84/x
  3. Step 3: Cross multiply
    15,928.39x = 21,981.18 × 8,854.84
  4. Step 4: Simplify right side
    15,928.39x = 194,639,831.91
  5. Step 5: Solve for x
    x = 194,639,831.91/15,928.39
  6. Step 6: Final answer
    x = 12,219.68

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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.