Home / 28,203.60-38,903.28-18,145.12

Finding the Fourth Proportional to 28,203.60, 38,903.28 and 18,145.12

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Solution

The fourth proportional to 28,203.60, 38,903.28 and 18,145.12 is: 25,028.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,203.60 : 38,903.28 = 18,145.12 : x
  2. Step 2: Convert to fraction form
    28,203.60/38,903.28 = 18,145.12/x
  3. Step 3: Cross multiply
    28,203.60x = 38,903.28 × 18,145.12
  4. Step 4: Simplify right side
    28,203.60x = 705,904,683.99
  5. Step 5: Solve for x
    x = 705,904,683.99/28,203.60
  6. Step 6: Final answer
    x = 25,028.89

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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.