Home / 15,400.62-21,253.58-8,686.10

Finding the Fourth Proportional to 15,400.62, 21,253.58 and 8,686.10

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Solution

The fourth proportional to 15,400.62, 21,253.58 and 8,686.10 is: 11,987.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.62 : 21,253.58 = 8,686.10 : x
  2. Step 2: Convert to fraction form
    15,400.62/21,253.58 = 8,686.10/x
  3. Step 3: Cross multiply
    15,400.62x = 21,253.58 × 8,686.10
  4. Step 4: Simplify right side
    15,400.62x = 184,610,721.24
  5. Step 5: Solve for x
    x = 184,610,721.24/15,400.62
  6. Step 6: Final answer
    x = 11,987.23

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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.