Home / 21,218.85-29,278.77-12,264.63

Finding the Fourth Proportional to 21,218.85, 29,278.77 and 12,264.63

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Solution

The fourth proportional to 21,218.85, 29,278.77 and 12,264.63 is: 16,923.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.85 : 29,278.77 = 12,264.63 : x
  2. Step 2: Convert to fraction form
    21,218.85/29,278.77 = 12,264.63/x
  3. Step 3: Cross multiply
    21,218.85x = 29,278.77 × 12,264.63
  4. Step 4: Simplify right side
    21,218.85x = 359,093,280.91
  5. Step 5: Solve for x
    x = 359,093,280.91/21,218.85
  6. Step 6: Final answer
    x = 16,923.31

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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.