Home / 21,730.74-29,987.38-13,345.62

Finding the Fourth Proportional to 21,730.74, 29,987.38 and 13,345.62

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Solution

The fourth proportional to 21,730.74, 29,987.38 and 13,345.62 is: 18,416.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730.74 : 29,987.38 = 13,345.62 : x
  2. Step 2: Convert to fraction form
    21,730.74/29,987.38 = 13,345.62/x
  3. Step 3: Cross multiply
    21,730.74x = 29,987.38 × 13,345.62
  4. Step 4: Simplify right side
    21,730.74x = 400,199,961.61
  5. Step 5: Solve for x
    x = 400,199,961.61/21,730.74
  6. Step 6: Final answer
    x = 18,416.31

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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.