Home / 20,762.90-31,148.45-7,615.38

Finding the Fourth Proportional to 20,762.90, 31,148.45 and 7,615.38

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Solution

The fourth proportional to 20,762.90, 31,148.45 and 7,615.38 is: 11,424.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.90 : 31,148.45 = 7,615.38 : x
  2. Step 2: Convert to fraction form
    20,762.90/31,148.45 = 7,615.38/x
  3. Step 3: Cross multiply
    20,762.90x = 31,148.45 × 7,615.38
  4. Step 4: Simplify right side
    20,762.90x = 237,207,390.45
  5. Step 5: Solve for x
    x = 237,207,390.45/20,762.90
  6. Step 6: Final answer
    x = 11,424.58

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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.