Home / 21,570.18-32,350.41-8,415.78

Finding the Fourth Proportional to 21,570.18, 32,350.41 and 8,415.78

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Solution

The fourth proportional to 21,570.18, 32,350.41 and 8,415.78 is: 12,621.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,570.18 : 32,350.41 = 8,415.78 : x
  2. Step 2: Convert to fraction form
    21,570.18/32,350.41 = 8,415.78/x
  3. Step 3: Cross multiply
    21,570.18x = 32,350.41 × 8,415.78
  4. Step 4: Simplify right side
    21,570.18x = 272,253,933.47
  5. Step 5: Solve for x
    x = 272,253,933.47/21,570.18
  6. Step 6: Final answer
    x = 12,621.77

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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.