Home / 12,981.68-17,921.60-10,401.35

Finding the Fourth Proportional to 12,981.68, 17,921.60 and 10,401.35

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Solution

The fourth proportional to 12,981.68, 17,921.60 and 10,401.35 is: 14,359.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,981.68 : 17,921.60 = 10,401.35 : x
  2. Step 2: Convert to fraction form
    12,981.68/17,921.60 = 10,401.35/x
  3. Step 3: Cross multiply
    12,981.68x = 17,921.60 × 10,401.35
  4. Step 4: Simplify right side
    12,981.68x = 186,408,834.16
  5. Step 5: Solve for x
    x = 186,408,834.16/12,981.68
  6. Step 6: Final answer
    x = 14,359.38

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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.