Home / 26,387.72-36,417.80-15,639

Finding the Fourth Proportional to 26,387.72, 36,417.80 and 15,639

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Solution

The fourth proportional to 26,387.72, 36,417.80 and 15,639 is: 21,583.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,387.72 : 36,417.80 = 15,639 : x
  2. Step 2: Convert to fraction form
    26,387.72/36,417.80 = 15,639/x
  3. Step 3: Cross multiply
    26,387.72x = 36,417.80 × 15,639
  4. Step 4: Simplify right side
    26,387.72x = 569,537,974.20
  5. Step 5: Solve for x
    x = 569,537,974.20/26,387.72
  6. Step 6: Final answer
    x = 21,583.45

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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.