Home / 8,388.78-11,570.40-7,127.85

Finding the Fourth Proportional to 8,388.78, 11,570.40 and 7,127.85

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Solution

The fourth proportional to 8,388.78, 11,570.40 and 7,127.85 is: 9,831.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,388.78 : 11,570.40 = 7,127.85 : x
  2. Step 2: Convert to fraction form
    8,388.78/11,570.40 = 7,127.85/x
  3. Step 3: Cross multiply
    8,388.78x = 11,570.40 × 7,127.85
  4. Step 4: Simplify right side
    8,388.78x = 82,472,075.64
  5. Step 5: Solve for x
    x = 82,472,075.64/8,388.78
  6. Step 6: Final answer
    x = 9,831.24

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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.