Home / 20,275.47-27,980.73-11,322.75

Finding the Fourth Proportional to 20,275.47, 27,980.73 and 11,322.75

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Solution

The fourth proportional to 20,275.47, 27,980.73 and 11,322.75 is: 15,625.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,275.47 : 27,980.73 = 11,322.75 : x
  2. Step 2: Convert to fraction form
    20,275.47/27,980.73 = 11,322.75/x
  3. Step 3: Cross multiply
    20,275.47x = 27,980.73 × 11,322.75
  4. Step 4: Simplify right side
    20,275.47x = 316,818,810.61
  5. Step 5: Solve for x
    x = 316,818,810.61/20,275.47
  6. Step 6: Final answer
    x = 15,625.72

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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.