Home / 15,424.32-21,291.12-10,120.32

Finding the Fourth Proportional to 15,424.32, 21,291.12 and 10,120.32

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Solution

The fourth proportional to 15,424.32, 21,291.12 and 10,120.32 is: 13,969.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,424.32 : 21,291.12 = 10,120.32 : x
  2. Step 2: Convert to fraction form
    15,424.32/21,291.12 = 10,120.32/x
  3. Step 3: Cross multiply
    15,424.32x = 21,291.12 × 10,120.32
  4. Step 4: Simplify right side
    15,424.32x = 215,472,947.56
  5. Step 5: Solve for x
    x = 215,472,947.56/15,424.32
  6. Step 6: Final answer
    x = 13,969.69

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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.