Home / 21,997.86-32,931.12-15,420.42

Finding the Fourth Proportional to 21,997.86, 32,931.12 and 15,420.42

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Solution

The fourth proportional to 21,997.86, 32,931.12 and 15,420.42 is: 23,084.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,997.86 : 32,931.12 = 15,420.42 : x
  2. Step 2: Convert to fraction form
    21,997.86/32,931.12 = 15,420.42/x
  3. Step 3: Cross multiply
    21,997.86x = 32,931.12 × 15,420.42
  4. Step 4: Simplify right side
    21,997.86x = 507,811,701.47
  5. Step 5: Solve for x
    x = 507,811,701.47/21,997.86
  6. Step 6: Final answer
    x = 23,084.60

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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.