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Finding the Fourth Proportional to 21,598.96, 29,820.12 and 15,649.84

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Solution

The fourth proportional to 21,598.96, 29,820.12 and 15,649.84 is: 21,606.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,598.96 : 29,820.12 = 15,649.84 : x
  2. Step 2: Convert to fraction form
    21,598.96/29,820.12 = 15,649.84/x
  3. Step 3: Cross multiply
    21,598.96x = 29,820.12 × 15,649.84
  4. Step 4: Simplify right side
    21,598.96x = 466,680,106.78
  5. Step 5: Solve for x
    x = 466,680,106.78/21,598.96
  6. Step 6: Final answer
    x = 21,606.60

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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.