Home / 20,810.47-31,201.12-7,661.13

Finding the Fourth Proportional to 20,810.47, 31,201.12 and 7,661.13

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Solution

The fourth proportional to 20,810.47, 31,201.12 and 7,661.13 is: 11,486.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.47 : 31,201.12 = 7,661.13 : x
  2. Step 2: Convert to fraction form
    20,810.47/31,201.12 = 7,661.13/x
  3. Step 3: Cross multiply
    20,810.47x = 31,201.12 × 7,661.13
  4. Step 4: Simplify right side
    20,810.47x = 239,035,798.16
  5. Step 5: Solve for x
    x = 239,035,798.16/20,810.47
  6. Step 6: Final answer
    x = 11,486.33

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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.