Home / 20,718.24-31,047.12-10,315.68

Finding the Fourth Proportional to 20,718.24, 31,047.12 and 10,315.68

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Solution

The fourth proportional to 20,718.24, 31,047.12 and 10,315.68 is: 15,458.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.24 : 31,047.12 = 10,315.68 : x
  2. Step 2: Convert to fraction form
    20,718.24/31,047.12 = 10,315.68/x
  3. Step 3: Cross multiply
    20,718.24x = 31,047.12 × 10,315.68
  4. Step 4: Simplify right side
    20,718.24x = 320,272,154.84
  5. Step 5: Solve for x
    x = 320,272,154.84/20,718.24
  6. Step 6: Final answer
    x = 15,458.46

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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.