Home / 21,618.47-32,421.90-8,288.57

Finding the Fourth Proportional to 21,618.47, 32,421.90 and 8,288.57

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Solution

The fourth proportional to 21,618.47, 32,421.90 and 8,288.57 is: 12,430.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.47 : 32,421.90 = 8,288.57 : x
  2. Step 2: Convert to fraction form
    21,618.47/32,421.90 = 8,288.57/x
  3. Step 3: Cross multiply
    21,618.47x = 32,421.90 × 8,288.57
  4. Step 4: Simplify right side
    21,618.47x = 268,731,187.68
  5. Step 5: Solve for x
    x = 268,731,187.68/21,618.47
  6. Step 6: Final answer
    x = 12,430.63

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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.