Home / 31,686.89-47,526.68-8,315.15

Finding the Fourth Proportional to 31,686.89, 47,526.68 and 8,315.15

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Solution

The fourth proportional to 31,686.89, 47,526.68 and 8,315.15 is: 12,471.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.89 : 47,526.68 = 8,315.15 : x
  2. Step 2: Convert to fraction form
    31,686.89/47,526.68 = 8,315.15/x
  3. Step 3: Cross multiply
    31,686.89x = 47,526.68 × 8,315.15
  4. Step 4: Simplify right side
    31,686.89x = 395,191,193.99
  5. Step 5: Solve for x
    x = 395,191,193.99/31,686.89
  6. Step 6: Final answer
    x = 12,471.76

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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.