Home / 15,685.76-21,647.40-10,371.44

Finding the Fourth Proportional to 15,685.76, 21,647.40 and 10,371.44

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Solution

The fourth proportional to 15,685.76, 21,647.40 and 10,371.44 is: 14,313.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.76 : 21,647.40 = 10,371.44 : x
  2. Step 2: Convert to fraction form
    15,685.76/21,647.40 = 10,371.44/x
  3. Step 3: Cross multiply
    15,685.76x = 21,647.40 × 10,371.44
  4. Step 4: Simplify right side
    15,685.76x = 224,514,710.26
  5. Step 5: Solve for x
    x = 224,514,710.26/15,685.76
  6. Step 6: Final answer
    x = 14,313.28

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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.