Home / 21,015.68-28,995.84-12,062.72

Finding the Fourth Proportional to 21,015.68, 28,995.84 and 12,062.72

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Solution

The fourth proportional to 21,015.68, 28,995.84 and 12,062.72 is: 16,643.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.68 : 28,995.84 = 12,062.72 : x
  2. Step 2: Convert to fraction form
    21,015.68/28,995.84 = 12,062.72/x
  3. Step 3: Cross multiply
    21,015.68x = 28,995.84 × 12,062.72
  4. Step 4: Simplify right side
    21,015.68x = 349,768,699.08
  5. Step 5: Solve for x
    x = 349,768,699.08/21,015.68
  6. Step 6: Final answer
    x = 16,643.23

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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.