Home / 20,752.40-31,109.70-7,601.60

Finding the Fourth Proportional to 20,752.40, 31,109.70 and 7,601.60

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Solution

The fourth proportional to 20,752.40, 31,109.70 and 7,601.60 is: 11,395.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.40 : 31,109.70 = 7,601.60 : x
  2. Step 2: Convert to fraction form
    20,752.40/31,109.70 = 7,601.60/x
  3. Step 3: Cross multiply
    20,752.40x = 31,109.70 × 7,601.60
  4. Step 4: Simplify right side
    20,752.40x = 236,483,495.52
  5. Step 5: Solve for x
    x = 236,483,495.52/20,752.40
  6. Step 6: Final answer
    x = 11,395.48

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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.