Home / 15,321.40-21,142.74-8,607.31

Finding the Fourth Proportional to 15,321.40, 21,142.74 and 8,607.31

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Solution

The fourth proportional to 15,321.40, 21,142.74 and 8,607.31 is: 11,877.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.40 : 21,142.74 = 8,607.31 : x
  2. Step 2: Convert to fraction form
    15,321.40/21,142.74 = 8,607.31/x
  3. Step 3: Cross multiply
    15,321.40x = 21,142.74 × 8,607.31
  4. Step 4: Simplify right side
    15,321.40x = 181,982,117.43
  5. Step 5: Solve for x
    x = 181,982,117.43/15,321.40
  6. Step 6: Final answer
    x = 11,877.64

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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.