Home / 19,939.20-29,908.80-13,718.40

Finding the Fourth Proportional to 19,939.20, 29,908.80 and 13,718.40

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Solution

The fourth proportional to 19,939.20, 29,908.80 and 13,718.40 is: 20,577.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,939.20 : 29,908.80 = 13,718.40 : x
  2. Step 2: Convert to fraction form
    19,939.20/29,908.80 = 13,718.40/x
  3. Step 3: Cross multiply
    19,939.20x = 29,908.80 × 13,718.40
  4. Step 4: Simplify right side
    19,939.20x = 410,300,881.92
  5. Step 5: Solve for x
    x = 410,300,881.92/19,939.20
  6. Step 6: Final answer
    x = 20,577.60

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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.