Home / 20,743.80-31,070.32-20,287.24

Finding the Fourth Proportional to 20,743.80, 31,070.32 and 20,287.24

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Solution

The fourth proportional to 20,743.80, 31,070.32 and 20,287.24 is: 30,386.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.80 : 31,070.32 = 20,287.24 : x
  2. Step 2: Convert to fraction form
    20,743.80/31,070.32 = 20,287.24/x
  3. Step 3: Cross multiply
    20,743.80x = 31,070.32 × 20,287.24
  4. Step 4: Simplify right side
    20,743.80x = 630,331,038.72
  5. Step 5: Solve for x
    x = 630,331,038.72/20,743.80
  6. Step 6: Final answer
    x = 30,386.48

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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.