Home / 31,102.08-42,944.40-20,506.56

Finding the Fourth Proportional to 31,102.08, 42,944.40 and 20,506.56

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Solution

The fourth proportional to 31,102.08, 42,944.40 and 20,506.56 is: 28,314.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,102.08 : 42,944.40 = 20,506.56 : x
  2. Step 2: Convert to fraction form
    31,102.08/42,944.40 = 20,506.56/x
  3. Step 3: Cross multiply
    31,102.08x = 42,944.40 × 20,506.56
  4. Step 4: Simplify right side
    31,102.08x = 880,641,915.26
  5. Step 5: Solve for x
    x = 880,641,915.26/31,102.08
  6. Step 6: Final answer
    x = 28,314.57

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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.