Home / 21,508.68-29,680.29-12,075.42

Finding the Fourth Proportional to 21,508.68, 29,680.29 and 12,075.42

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Solution

The fourth proportional to 21,508.68, 29,680.29 and 12,075.42 is: 16,663.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,508.68 : 29,680.29 = 12,075.42 : x
  2. Step 2: Convert to fraction form
    21,508.68/29,680.29 = 12,075.42/x
  3. Step 3: Cross multiply
    21,508.68x = 29,680.29 × 12,075.42
  4. Step 4: Simplify right side
    21,508.68x = 358,401,967.47
  5. Step 5: Solve for x
    x = 358,401,967.47/21,508.68
  6. Step 6: Final answer
    x = 16,663.13

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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.