Home / 15,484.30-21,366.39-12,821.02

Finding the Fourth Proportional to 15,484.30, 21,366.39 and 12,821.02

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Solution

The fourth proportional to 15,484.30, 21,366.39 and 12,821.02 is: 17,691.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,484.30 : 21,366.39 = 12,821.02 : x
  2. Step 2: Convert to fraction form
    15,484.30/21,366.39 = 12,821.02/x
  3. Step 3: Cross multiply
    15,484.30x = 21,366.39 × 12,821.02
  4. Step 4: Simplify right side
    15,484.30x = 273,938,913.52
  5. Step 5: Solve for x
    x = 273,938,913.52/15,484.30
  6. Step 6: Final answer
    x = 17,691.40

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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.