Home / 21,455.09-29,607.85-12,377.12

Finding the Fourth Proportional to 21,455.09, 29,607.85 and 12,377.12

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Solution

The fourth proportional to 21,455.09, 29,607.85 and 12,377.12 is: 17,080.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,455.09 : 29,607.85 = 12,377.12 : x
  2. Step 2: Convert to fraction form
    21,455.09/29,607.85 = 12,377.12/x
  3. Step 3: Cross multiply
    21,455.09x = 29,607.85 × 12,377.12
  4. Step 4: Simplify right side
    21,455.09x = 366,459,733.41
  5. Step 5: Solve for x
    x = 366,459,733.41/21,455.09
  6. Step 6: Final answer
    x = 17,080.32

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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.