Home / 21,465.90-29,629.13-12,966.68

Finding the Fourth Proportional to 21,465.90, 29,629.13 and 12,966.68

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Solution

The fourth proportional to 21,465.90, 29,629.13 and 12,966.68 is: 17,897.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,465.90 : 29,629.13 = 12,966.68 : x
  2. Step 2: Convert to fraction form
    21,465.90/29,629.13 = 12,966.68/x
  3. Step 3: Cross multiply
    21,465.90x = 29,629.13 × 12,966.68
  4. Step 4: Simplify right side
    21,465.90x = 384,191,234.41
  5. Step 5: Solve for x
    x = 384,191,234.41/21,465.90
  6. Step 6: Final answer
    x = 17,897.75

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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.