Home / 31,631.31-43,657.28-20,315.10

Finding the Fourth Proportional to 31,631.31, 43,657.28 and 20,315.10

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Solution

The fourth proportional to 31,631.31, 43,657.28 and 20,315.10 is: 28,038.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,631.31 : 43,657.28 = 20,315.10 : x
  2. Step 2: Convert to fraction form
    31,631.31/43,657.28 = 20,315.10/x
  3. Step 3: Cross multiply
    31,631.31x = 43,657.28 × 20,315.10
  4. Step 4: Simplify right side
    31,631.31x = 886,902,147.25
  5. Step 5: Solve for x
    x = 886,902,147.25/31,631.31
  6. Step 6: Final answer
    x = 28,038.74

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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.