Home / 21,730.48-29,987.80-12,298.80

Finding the Fourth Proportional to 21,730.48, 29,987.80 and 12,298.80

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Solution

The fourth proportional to 21,730.48, 29,987.80 and 12,298.80 is: 16,972.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730.48 : 29,987.80 = 12,298.80 : x
  2. Step 2: Convert to fraction form
    21,730.48/29,987.80 = 12,298.80/x
  3. Step 3: Cross multiply
    21,730.48x = 29,987.80 × 12,298.80
  4. Step 4: Simplify right side
    21,730.48x = 368,813,954.64
  5. Step 5: Solve for x
    x = 368,813,954.64/21,730.48
  6. Step 6: Final answer
    x = 16,972.20

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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.