Home / 12,343.61-18,514.35-9,990.76

Finding the Fourth Proportional to 12,343.61, 18,514.35 and 9,990.76

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Solution

The fourth proportional to 12,343.61, 18,514.35 and 9,990.76 is: 14,985.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,343.61 : 18,514.35 = 9,990.76 : x
  2. Step 2: Convert to fraction form
    12,343.61/18,514.35 = 9,990.76/x
  3. Step 3: Cross multiply
    12,343.61x = 18,514.35 × 9,990.76
  4. Step 4: Simplify right side
    12,343.61x = 184,972,427.41
  5. Step 5: Solve for x
    x = 184,972,427.41/12,343.61
  6. Step 6: Final answer
    x = 14,985.28

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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.