Home / 31,003.60-42,784.50-16,856.32

Finding the Fourth Proportional to 31,003.60, 42,784.50 and 16,856.32

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Solution

The fourth proportional to 31,003.60, 42,784.50 and 16,856.32 is: 23,261.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,003.60 : 42,784.50 = 16,856.32 : x
  2. Step 2: Convert to fraction form
    31,003.60/42,784.50 = 16,856.32/x
  3. Step 3: Cross multiply
    31,003.60x = 42,784.50 × 16,856.32
  4. Step 4: Simplify right side
    31,003.60x = 721,189,223.04
  5. Step 5: Solve for x
    x = 721,189,223.04/31,003.60
  6. Step 6: Final answer
    x = 23,261.47

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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.