Home / 13,864.47-19,131.55-7,894.90

Finding the Fourth Proportional to 13,864.47, 19,131.55 and 7,894.90

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Solution

The fourth proportional to 13,864.47, 19,131.55 and 7,894.90 is: 10,894.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,864.47 : 19,131.55 = 7,894.90 : x
  2. Step 2: Convert to fraction form
    13,864.47/19,131.55 = 7,894.90/x
  3. Step 3: Cross multiply
    13,864.47x = 19,131.55 × 7,894.90
  4. Step 4: Simplify right side
    13,864.47x = 151,041,674.10
  5. Step 5: Solve for x
    x = 151,041,674.10/13,864.47
  6. Step 6: Final answer
    x = 10,894.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.