Home / 31,390.98-47,102.49-20,868.18

Finding the Fourth Proportional to 31,390.98, 47,102.49 and 20,868.18

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Solution

The fourth proportional to 31,390.98, 47,102.49 and 20,868.18 is: 31,312.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,390.98 : 47,102.49 = 20,868.18 : x
  2. Step 2: Convert to fraction form
    31,390.98/47,102.49 = 20,868.18/x
  3. Step 3: Cross multiply
    31,390.98x = 47,102.49 × 20,868.18
  4. Step 4: Simplify right side
    31,390.98x = 982,943,239.77
  5. Step 5: Solve for x
    x = 982,943,239.77/31,390.98
  6. Step 6: Final answer
    x = 31,312.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.