Home / 31,486.08-43,432.32-18,913.92

Finding the Fourth Proportional to 31,486.08, 43,432.32 and 18,913.92

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Solution

The fourth proportional to 31,486.08, 43,432.32 and 18,913.92 is: 26,090.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,486.08 : 43,432.32 = 18,913.92 : x
  2. Step 2: Convert to fraction form
    31,486.08/43,432.32 = 18,913.92/x
  3. Step 3: Cross multiply
    31,486.08x = 43,432.32 × 18,913.92
  4. Step 4: Simplify right side
    31,486.08x = 821,475,425.89
  5. Step 5: Solve for x
    x = 821,475,425.89/31,486.08
  6. Step 6: Final answer
    x = 26,090.11

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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.