Home / 13,715.04-20,561.52-12,621.36

Finding the Fourth Proportional to 13,715.04, 20,561.52 and 12,621.36

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Solution

The fourth proportional to 13,715.04, 20,561.52 and 12,621.36 is: 18,921.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,715.04 : 20,561.52 = 12,621.36 : x
  2. Step 2: Convert to fraction form
    13,715.04/20,561.52 = 12,621.36/x
  3. Step 3: Cross multiply
    13,715.04x = 20,561.52 × 12,621.36
  4. Step 4: Simplify right side
    13,715.04x = 259,514,346.07
  5. Step 5: Solve for x
    x = 259,514,346.07/13,715.04
  6. Step 6: Final answer
    x = 18,921.88

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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.