Home / 13,159.20-19,717.20-12,381.60

Finding the Fourth Proportional to 13,159.20, 19,717.20 and 12,381.60

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Solution

The fourth proportional to 13,159.20, 19,717.20 and 12,381.60 is: 18,552.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.20 : 19,717.20 = 12,381.60 : x
  2. Step 2: Convert to fraction form
    13,159.20/19,717.20 = 12,381.60/x
  3. Step 3: Cross multiply
    13,159.20x = 19,717.20 × 12,381.60
  4. Step 4: Simplify right side
    13,159.20x = 244,130,483.52
  5. Step 5: Solve for x
    x = 244,130,483.52/13,159.20
  6. Step 6: Final answer
    x = 18,552.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.