Home / 18,677.64-25,812.30-15,315.24

Finding the Fourth Proportional to 18,677.64, 25,812.30 and 15,315.24

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Solution

The fourth proportional to 18,677.64, 25,812.30 and 15,315.24 is: 21,165.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,677.64 : 25,812.30 = 15,315.24 : x
  2. Step 2: Convert to fraction form
    18,677.64/25,812.30 = 15,315.24/x
  3. Step 3: Cross multiply
    18,677.64x = 25,812.30 × 15,315.24
  4. Step 4: Simplify right side
    18,677.64x = 395,321,569.45
  5. Step 5: Solve for x
    x = 395,321,569.45/18,677.64
  6. Step 6: Final answer
    x = 21,165.50

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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.