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Finding the Fourth Proportional to 28,016.40, 42,010.20 and 10,477.20

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Solution

The fourth proportional to 28,016.40, 42,010.20 and 10,477.20 is: 15,710.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,016.40 : 42,010.20 = 10,477.20 : x
  2. Step 2: Convert to fraction form
    28,016.40/42,010.20 = 10,477.20/x
  3. Step 3: Cross multiply
    28,016.40x = 42,010.20 × 10,477.20
  4. Step 4: Simplify right side
    28,016.40x = 440,149,267.44
  5. Step 5: Solve for x
    x = 440,149,267.44/28,016.40
  6. Step 6: Final answer
    x = 15,710.41

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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.