Home / 15,534.56-21,438.86-8,820.47

Finding the Fourth Proportional to 15,534.56, 21,438.86 and 8,820.47

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Solution

The fourth proportional to 15,534.56, 21,438.86 and 8,820.47 is: 12,172.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,534.56 : 21,438.86 = 8,820.47 : x
  2. Step 2: Convert to fraction form
    15,534.56/21,438.86 = 8,820.47/x
  3. Step 3: Cross multiply
    15,534.56x = 21,438.86 × 8,820.47
  4. Step 4: Simplify right side
    15,534.56x = 189,100,830.96
  5. Step 5: Solve for x
    x = 189,100,830.96/15,534.56
  6. Step 6: Final answer
    x = 12,172.91

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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.