Home / 15,408.12-21,256.45-9,031.48

Finding the Fourth Proportional to 15,408.12, 21,256.45 and 9,031.48

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Solution

The fourth proportional to 15,408.12, 21,256.45 and 9,031.48 is: 12,459.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,408.12 : 21,256.45 = 9,031.48 : x
  2. Step 2: Convert to fraction form
    15,408.12/21,256.45 = 9,031.48/x
  3. Step 3: Cross multiply
    15,408.12x = 21,256.45 × 9,031.48
  4. Step 4: Simplify right side
    15,408.12x = 191,977,250.61
  5. Step 5: Solve for x
    x = 191,977,250.61/15,408.12
  6. Step 6: Final answer
    x = 12,459.48

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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.