Home / 38,459.40-57,678.30-12,172.20

Finding the Fourth Proportional to 38,459.40, 57,678.30 and 12,172.20

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Solution

The fourth proportional to 38,459.40, 57,678.30 and 12,172.20 is: 18,254.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,459.40 : 57,678.30 = 12,172.20 : x
  2. Step 2: Convert to fraction form
    38,459.40/57,678.30 = 12,172.20/x
  3. Step 3: Cross multiply
    38,459.40x = 57,678.30 × 12,172.20
  4. Step 4: Simplify right side
    38,459.40x = 702,071,803.26
  5. Step 5: Solve for x
    x = 702,071,803.26/38,459.40
  6. Step 6: Final answer
    x = 18,254.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.