Home / 13,931.04-20,895.78-10,186.65

Finding the Fourth Proportional to 13,931.04, 20,895.78 and 10,186.65

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Solution

The fourth proportional to 13,931.04, 20,895.78 and 10,186.65 is: 15,279.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.04 : 20,895.78 = 10,186.65 : x
  2. Step 2: Convert to fraction form
    13,931.04/20,895.78 = 10,186.65/x
  3. Step 3: Cross multiply
    13,931.04x = 20,895.78 × 10,186.65
  4. Step 4: Simplify right side
    13,931.04x = 212,857,997.34
  5. Step 5: Solve for x
    x = 212,857,997.34/13,931.04
  6. Step 6: Final answer
    x = 15,279.40

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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.