Home / 15,686.76-21,640.44-10,018.65

Finding the Fourth Proportional to 15,686.76, 21,640.44 and 10,018.65

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Solution

The fourth proportional to 15,686.76, 21,640.44 and 10,018.65 is: 13,821.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.76 : 21,640.44 = 10,018.65 : x
  2. Step 2: Convert to fraction form
    15,686.76/21,640.44 = 10,018.65/x
  3. Step 3: Cross multiply
    15,686.76x = 21,640.44 × 10,018.65
  4. Step 4: Simplify right side
    15,686.76x = 216,807,994.21
  5. Step 5: Solve for x
    x = 216,807,994.21/15,686.76
  6. Step 6: Final answer
    x = 13,821.08

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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.