Home / 21,290.93-29,381.76-11,859.49

Finding the Fourth Proportional to 21,290.93, 29,381.76 and 11,859.49

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Solution

The fourth proportional to 21,290.93, 29,381.76 and 11,859.49 is: 16,366.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.93 : 29,381.76 = 11,859.49 : x
  2. Step 2: Convert to fraction form
    21,290.93/29,381.76 = 11,859.49/x
  3. Step 3: Cross multiply
    21,290.93x = 29,381.76 × 11,859.49
  4. Step 4: Simplify right side
    21,290.93x = 348,452,688.90
  5. Step 5: Solve for x
    x = 348,452,688.90/21,290.93
  6. Step 6: Final answer
    x = 16,366.25

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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.