Home / 20,278.37-30,417.75-7,130.85

Finding the Fourth Proportional to 20,278.37, 30,417.75 and 7,130.85

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Solution

The fourth proportional to 20,278.37, 30,417.75 and 7,130.85 is: 10,696.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.37 : 30,417.75 = 7,130.85 : x
  2. Step 2: Convert to fraction form
    20,278.37/30,417.75 = 7,130.85/x
  3. Step 3: Cross multiply
    20,278.37x = 30,417.75 × 7,130.85
  4. Step 4: Simplify right side
    20,278.37x = 216,904,412.59
  5. Step 5: Solve for x
    x = 216,904,412.59/20,278.37
  6. Step 6: Final answer
    x = 10,696.35

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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.