Home / 21,012.16-28,997.04-13,925.92

Finding the Fourth Proportional to 21,012.16, 28,997.04 and 13,925.92

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Solution

The fourth proportional to 21,012.16, 28,997.04 and 13,925.92 is: 19,217.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.16 : 28,997.04 = 13,925.92 : x
  2. Step 2: Convert to fraction form
    21,012.16/28,997.04 = 13,925.92/x
  3. Step 3: Cross multiply
    21,012.16x = 28,997.04 × 13,925.92
  4. Step 4: Simplify right side
    21,012.16x = 403,810,459.28
  5. Step 5: Solve for x
    x = 403,810,459.28/21,012.16
  6. Step 6: Final answer
    x = 19,217.94

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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.