Home / 18,856.40-28,270.20-11,459.28

Finding the Fourth Proportional to 18,856.40, 28,270.20 and 11,459.28

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Solution

The fourth proportional to 18,856.40, 28,270.20 and 11,459.28 is: 17,180.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,856.40 : 28,270.20 = 11,459.28 : x
  2. Step 2: Convert to fraction form
    18,856.40/28,270.20 = 11,459.28/x
  3. Step 3: Cross multiply
    18,856.40x = 28,270.20 × 11,459.28
  4. Step 4: Simplify right side
    18,856.40x = 323,956,137.46
  5. Step 5: Solve for x
    x = 323,956,137.46/18,856.40
  6. Step 6: Final answer
    x = 17,180.17

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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.