Home / 21,085.50-29,102.84-12,138.19

Finding the Fourth Proportional to 21,085.50, 29,102.84 and 12,138.19

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Solution

The fourth proportional to 21,085.50, 29,102.84 and 12,138.19 is: 16,753.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.50 : 29,102.84 = 12,138.19 : x
  2. Step 2: Convert to fraction form
    21,085.50/29,102.84 = 12,138.19/x
  3. Step 3: Cross multiply
    21,085.50x = 29,102.84 × 12,138.19
  4. Step 4: Simplify right side
    21,085.50x = 353,255,801.46
  5. Step 5: Solve for x
    x = 353,255,801.46/21,085.50
  6. Step 6: Final answer
    x = 16,753.49

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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.