Home / 15,320.78-21,137.14-10,018.66

Finding the Fourth Proportional to 15,320.78, 21,137.14 and 10,018.66

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Solution

The fourth proportional to 15,320.78, 21,137.14 and 10,018.66 is: 13,822.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.78 : 21,137.14 = 10,018.66 : x
  2. Step 2: Convert to fraction form
    15,320.78/21,137.14 = 10,018.66/x
  3. Step 3: Cross multiply
    15,320.78x = 21,137.14 × 10,018.66
  4. Step 4: Simplify right side
    15,320.78x = 211,765,819.03
  5. Step 5: Solve for x
    x = 211,765,819.03/15,320.78
  6. Step 6: Final answer
    x = 13,822.13

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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.