Home / 21,228.66-29,288.10-13,267.98

Finding the Fourth Proportional to 21,228.66, 29,288.10 and 13,267.98

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Solution

The fourth proportional to 21,228.66, 29,288.10 and 13,267.98 is: 18,305.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.66 : 29,288.10 = 13,267.98 : x
  2. Step 2: Convert to fraction form
    21,228.66/29,288.10 = 13,267.98/x
  3. Step 3: Cross multiply
    21,228.66x = 29,288.10 × 13,267.98
  4. Step 4: Simplify right side
    21,228.66x = 388,593,925.04
  5. Step 5: Solve for x
    x = 388,593,925.04/21,228.66
  6. Step 6: Final answer
    x = 18,305.16

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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.