Home / 10,399.80-14,279.16-10,129.08

Finding the Fourth Proportional to 10,399.80, 14,279.16 and 10,129.08

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Solution

The fourth proportional to 10,399.80, 14,279.16 and 10,129.08 is: 13,907.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,399.80 : 14,279.16 = 10,129.08 : x
  2. Step 2: Convert to fraction form
    10,399.80/14,279.16 = 10,129.08/x
  3. Step 3: Cross multiply
    10,399.80x = 14,279.16 × 10,129.08
  4. Step 4: Simplify right side
    10,399.80x = 144,634,753.97
  5. Step 5: Solve for x
    x = 144,634,753.97/10,399.80
  6. Step 6: Final answer
    x = 13,907.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.