Home / 15,806.19-21,812.28-8,635.95

Finding the Fourth Proportional to 15,806.19, 21,812.28 and 8,635.95

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Solution

The fourth proportional to 15,806.19, 21,812.28 and 8,635.95 is: 11,917.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,806.19 : 21,812.28 = 8,635.95 : x
  2. Step 2: Convert to fraction form
    15,806.19/21,812.28 = 8,635.95/x
  3. Step 3: Cross multiply
    15,806.19x = 21,812.28 × 8,635.95
  4. Step 4: Simplify right side
    15,806.19x = 188,369,700.57
  5. Step 5: Solve for x
    x = 188,369,700.57/15,806.19
  6. Step 6: Final answer
    x = 11,917.47

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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.