Home / 20,715.78-31,073.67-5,133.41

Finding the Fourth Proportional to 20,715.78, 31,073.67 and 5,133.41

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Solution

The fourth proportional to 20,715.78, 31,073.67 and 5,133.41 is: 7,700.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.78 : 31,073.67 = 5,133.41 : x
  2. Step 2: Convert to fraction form
    20,715.78/31,073.67 = 5,133.41/x
  3. Step 3: Cross multiply
    20,715.78x = 31,073.67 × 5,133.41
  4. Step 4: Simplify right side
    20,715.78x = 159,513,888.31
  5. Step 5: Solve for x
    x = 159,513,888.31/20,715.78
  6. Step 6: Final answer
    x = 7,700.12

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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.