Home / 31,042.50-42,808.87-20,856.54

Finding the Fourth Proportional to 31,042.50, 42,808.87 and 20,856.54

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Solution

The fourth proportional to 31,042.50, 42,808.87 and 20,856.54 is: 28,762.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,042.50 : 42,808.87 = 20,856.54 : x
  2. Step 2: Convert to fraction form
    31,042.50/42,808.87 = 20,856.54/x
  3. Step 3: Cross multiply
    31,042.50x = 42,808.87 × 20,856.54
  4. Step 4: Simplify right side
    31,042.50x = 892,844,909.51
  5. Step 5: Solve for x
    x = 892,844,909.51/31,042.50
  6. Step 6: Final answer
    x = 28,762.02

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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.