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Finding the Fourth Proportional to 31,108.40, 46,658.40 and 12,402.20

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Solution

The fourth proportional to 31,108.40, 46,658.40 and 12,402.20 is: 18,601.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.40 : 46,658.40 = 12,402.20 : x
  2. Step 2: Convert to fraction form
    31,108.40/46,658.40 = 12,402.20/x
  3. Step 3: Cross multiply
    31,108.40x = 46,658.40 × 12,402.20
  4. Step 4: Simplify right side
    31,108.40x = 578,666,808.48
  5. Step 5: Solve for x
    x = 578,666,808.48/31,108.40
  6. Step 6: Final answer
    x = 18,601.63

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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.