Home / 15,513.30-21,408.12-8,439.66

Finding the Fourth Proportional to 15,513.30, 21,408.12 and 8,439.66

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Solution

The fourth proportional to 15,513.30, 21,408.12 and 8,439.66 is: 11,646.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.30 : 21,408.12 = 8,439.66 : x
  2. Step 2: Convert to fraction form
    15,513.30/21,408.12 = 8,439.66/x
  3. Step 3: Cross multiply
    15,513.30x = 21,408.12 × 8,439.66
  4. Step 4: Simplify right side
    15,513.30x = 180,677,254.04
  5. Step 5: Solve for x
    x = 180,677,254.04/15,513.30
  6. Step 6: Final answer
    x = 11,646.60

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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.