Home / 20,721.51-31,084.47-7,576.74

Finding the Fourth Proportional to 20,721.51, 31,084.47 and 7,576.74

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Solution

The fourth proportional to 20,721.51, 31,084.47 and 7,576.74 is: 11,365.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.51 : 31,084.47 = 7,576.74 : x
  2. Step 2: Convert to fraction form
    20,721.51/31,084.47 = 7,576.74/x
  3. Step 3: Cross multiply
    20,721.51x = 31,084.47 × 7,576.74
  4. Step 4: Simplify right side
    20,721.51x = 235,518,947.23
  5. Step 5: Solve for x
    x = 235,518,947.23/20,721.51
  6. Step 6: Final answer
    x = 11,365.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.