Home / 31,046.75-42,838.03-20,307.36

Finding the Fourth Proportional to 31,046.75, 42,838.03 and 20,307.36

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Solution

The fourth proportional to 31,046.75, 42,838.03 and 20,307.36 is: 28,019.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,046.75 : 42,838.03 = 20,307.36 : x
  2. Step 2: Convert to fraction form
    31,046.75/42,838.03 = 20,307.36/x
  3. Step 3: Cross multiply
    31,046.75x = 42,838.03 × 20,307.36
  4. Step 4: Simplify right side
    31,046.75x = 869,927,296.90
  5. Step 5: Solve for x
    x = 869,927,296.90/31,046.75
  6. Step 6: Final answer
    x = 28,019.92

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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.