Home / 20,643.65-28,488.56-11,212.28

Finding the Fourth Proportional to 20,643.65, 28,488.56 and 11,212.28

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Solution

The fourth proportional to 20,643.65, 28,488.56 and 11,212.28 is: 15,473.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.65 : 28,488.56 = 11,212.28 : x
  2. Step 2: Convert to fraction form
    20,643.65/28,488.56 = 11,212.28/x
  3. Step 3: Cross multiply
    20,643.65x = 28,488.56 × 11,212.28
  4. Step 4: Simplify right side
    20,643.65x = 319,421,711.52
  5. Step 5: Solve for x
    x = 319,421,711.52/20,643.65
  6. Step 6: Final answer
    x = 15,473.12

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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.