Home / 13,159.20-19,738.80-12,554.40

Finding the Fourth Proportional to 13,159.20, 19,738.80 and 12,554.40

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Solution

The fourth proportional to 13,159.20, 19,738.80 and 12,554.40 is: 18,831.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.20 : 19,738.80 = 12,554.40 : x
  2. Step 2: Convert to fraction form
    13,159.20/19,738.80 = 12,554.40/x
  3. Step 3: Cross multiply
    13,159.20x = 19,738.80 × 12,554.40
  4. Step 4: Simplify right side
    13,159.20x = 247,808,790.72
  5. Step 5: Solve for x
    x = 247,808,790.72/13,159.20
  6. Step 6: Final answer
    x = 18,831.60

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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.