Home / 20,953.02-31,424.67-7,811.58

Finding the Fourth Proportional to 20,953.02, 31,424.67 and 7,811.58

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Solution

The fourth proportional to 20,953.02, 31,424.67 and 7,811.58 is: 11,715.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.02 : 31,424.67 = 7,811.58 : x
  2. Step 2: Convert to fraction form
    20,953.02/31,424.67 = 7,811.58/x
  3. Step 3: Cross multiply
    20,953.02x = 31,424.67 × 7,811.58
  4. Step 4: Simplify right side
    20,953.02x = 245,476,323.68
  5. Step 5: Solve for x
    x = 245,476,323.68/20,953.02
  6. Step 6: Final answer
    x = 11,715.56

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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.