Home / 15,865.28-23,763.36-7,640

Finding the Fourth Proportional to 15,865.28, 23,763.36 and 7,640

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Solution

The fourth proportional to 15,865.28, 23,763.36 and 7,640 is: 11,443.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,865.28 : 23,763.36 = 7,640 : x
  2. Step 2: Convert to fraction form
    15,865.28/23,763.36 = 7,640/x
  3. Step 3: Cross multiply
    15,865.28x = 23,763.36 × 7,640
  4. Step 4: Simplify right side
    15,865.28x = 181,552,070.40
  5. Step 5: Solve for x
    x = 181,552,070.40/15,865.28
  6. Step 6: Final answer
    x = 11,443.36

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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.