Home / 20,685.78-31,009.86-7,535.16

Finding the Fourth Proportional to 20,685.78, 31,009.86 and 7,535.16

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Solution

The fourth proportional to 20,685.78, 31,009.86 and 7,535.16 is: 11,295.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.78 : 31,009.86 = 7,535.16 : x
  2. Step 2: Convert to fraction form
    20,685.78/31,009.86 = 7,535.16/x
  3. Step 3: Cross multiply
    20,685.78x = 31,009.86 × 7,535.16
  4. Step 4: Simplify right side
    20,685.78x = 233,664,256.68
  5. Step 5: Solve for x
    x = 233,664,256.68/20,685.78
  6. Step 6: Final answer
    x = 11,295.89

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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.