Home / 20,643.51-28,488.58-11,690.89

Finding the Fourth Proportional to 20,643.51, 28,488.58 and 11,690.89

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Solution

The fourth proportional to 20,643.51, 28,488.58 and 11,690.89 is: 16,133.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.51 : 28,488.58 = 11,690.89 : x
  2. Step 2: Convert to fraction form
    20,643.51/28,488.58 = 11,690.89/x
  3. Step 3: Cross multiply
    20,643.51x = 28,488.58 × 11,690.89
  4. Step 4: Simplify right side
    20,643.51x = 333,056,754.59
  5. Step 5: Solve for x
    x = 333,056,754.59/20,643.51
  6. Step 6: Final answer
    x = 16,133.72

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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.