Home / 21,307.68-29,363.04-15,328.80

Finding the Fourth Proportional to 21,307.68, 29,363.04 and 15,328.80

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Solution

The fourth proportional to 21,307.68, 29,363.04 and 15,328.80 is: 21,123.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.68 : 29,363.04 = 15,328.80 : x
  2. Step 2: Convert to fraction form
    21,307.68/29,363.04 = 15,328.80/x
  3. Step 3: Cross multiply
    21,307.68x = 29,363.04 × 15,328.80
  4. Step 4: Simplify right side
    21,307.68x = 450,100,167.55
  5. Step 5: Solve for x
    x = 450,100,167.55/21,307.68
  6. Step 6: Final answer
    x = 21,123.85

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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.