Home / 21,294.95-31,778.36-18,703.35

Finding the Fourth Proportional to 21,294.95, 31,778.36 and 18,703.35

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Solution

The fourth proportional to 21,294.95, 31,778.36 and 18,703.35 is: 27,910.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,294.95 : 31,778.36 = 18,703.35 : x
  2. Step 2: Convert to fraction form
    21,294.95/31,778.36 = 18,703.35/x
  3. Step 3: Cross multiply
    21,294.95x = 31,778.36 × 18,703.35
  4. Step 4: Simplify right side
    21,294.95x = 594,361,713.52
  5. Step 5: Solve for x
    x = 594,361,713.52/21,294.95
  6. Step 6: Final answer
    x = 27,910.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.