Home / 15,825.47-21,841.21-9,111.38

Finding the Fourth Proportional to 15,825.47, 21,841.21 and 9,111.38

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Solution

The fourth proportional to 15,825.47, 21,841.21 and 9,111.38 is: 12,574.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,825.47 : 21,841.21 = 9,111.38 : x
  2. Step 2: Convert to fraction form
    15,825.47/21,841.21 = 9,111.38/x
  3. Step 3: Cross multiply
    15,825.47x = 21,841.21 × 9,111.38
  4. Step 4: Simplify right side
    15,825.47x = 199,003,466.15
  5. Step 5: Solve for x
    x = 199,003,466.15/15,825.47
  6. Step 6: Final answer
    x = 12,574.89

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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.