Home / 21,780.28-32,670.45-14,431.42

Finding the Fourth Proportional to 21,780.28, 32,670.45 and 14,431.42

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Solution

The fourth proportional to 21,780.28, 32,670.45 and 14,431.42 is: 21,647.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.28 : 32,670.45 = 14,431.42 : x
  2. Step 2: Convert to fraction form
    21,780.28/32,670.45 = 14,431.42/x
  3. Step 3: Cross multiply
    21,780.28x = 32,670.45 × 14,431.42
  4. Step 4: Simplify right side
    21,780.28x = 471,480,985.54
  5. Step 5: Solve for x
    x = 471,480,985.54/21,780.28
  6. Step 6: Final answer
    x = 21,647.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.