Home / 31,663.76-43,705.08-20,916.48

Finding the Fourth Proportional to 31,663.76, 43,705.08 and 20,916.48

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Solution

The fourth proportional to 31,663.76, 43,705.08 and 20,916.48 is: 28,870.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,663.76 : 43,705.08 = 20,916.48 : x
  2. Step 2: Convert to fraction form
    31,663.76/43,705.08 = 20,916.48/x
  3. Step 3: Cross multiply
    31,663.76x = 43,705.08 × 20,916.48
  4. Step 4: Simplify right side
    31,663.76x = 914,156,431.72
  5. Step 5: Solve for x
    x = 914,156,431.72/31,663.76
  6. Step 6: Final answer
    x = 28,870.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.