Home / 10,422.40-14,382.80-5,642.23

Finding the Fourth Proportional to 10,422.40, 14,382.80 and 5,642.23

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Solution

The fourth proportional to 10,422.40, 14,382.80 and 5,642.23 is: 7,786.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,422.40 : 14,382.80 = 5,642.23 : x
  2. Step 2: Convert to fraction form
    10,422.40/14,382.80 = 5,642.23/x
  3. Step 3: Cross multiply
    10,422.40x = 14,382.80 × 5,642.23
  4. Step 4: Simplify right side
    10,422.40x = 81,151,096.00
  5. Step 5: Solve for x
    x = 81,151,096.00/10,422.40
  6. Step 6: Final answer
    x = 7,786.22

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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.