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Finding the Fourth Proportional to 28,015.92, 42,023.76 and 7,239.36

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Solution

The fourth proportional to 28,015.92, 42,023.76 and 7,239.36 is: 10,859.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015.92 : 42,023.76 = 7,239.36 : x
  2. Step 2: Convert to fraction form
    28,015.92/42,023.76 = 7,239.36/x
  3. Step 3: Cross multiply
    28,015.92x = 42,023.76 × 7,239.36
  4. Step 4: Simplify right side
    28,015.92x = 304,225,127.19
  5. Step 5: Solve for x
    x = 304,225,127.19/28,015.92
  6. Step 6: Final answer
    x = 10,859.01

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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.