Home / 15,534.77-21,438.52-8,820.17

Finding the Fourth Proportional to 15,534.77, 21,438.52 and 8,820.17

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Solution

The fourth proportional to 15,534.77, 21,438.52 and 8,820.17 is: 12,172.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,534.77 : 21,438.52 = 8,820.17 : x
  2. Step 2: Convert to fraction form
    15,534.77/21,438.52 = 8,820.17/x
  3. Step 3: Cross multiply
    15,534.77x = 21,438.52 × 8,820.17
  4. Step 4: Simplify right side
    15,534.77x = 189,091,390.95
  5. Step 5: Solve for x
    x = 189,091,390.95/15,534.77
  6. Step 6: Final answer
    x = 12,172.14

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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.