Home / 11,528.48-15,911.70-7,542.20

Finding the Fourth Proportional to 11,528.48, 15,911.70 and 7,542.20

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Solution

The fourth proportional to 11,528.48, 15,911.70 and 7,542.20 is: 10,409.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,528.48 : 15,911.70 = 7,542.20 : x
  2. Step 2: Convert to fraction form
    11,528.48/15,911.70 = 7,542.20/x
  3. Step 3: Cross multiply
    11,528.48x = 15,911.70 × 7,542.20
  4. Step 4: Simplify right side
    11,528.48x = 120,009,223.74
  5. Step 5: Solve for x
    x = 120,009,223.74/11,528.48
  6. Step 6: Final answer
    x = 10,409.80

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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.