Home / 20,277.10-30,415.65-7,130.80

Finding the Fourth Proportional to 20,277.10, 30,415.65 and 7,130.80

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Solution

The fourth proportional to 20,277.10, 30,415.65 and 7,130.80 is: 10,696.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,277.10 : 30,415.65 = 7,130.80 : x
  2. Step 2: Convert to fraction form
    20,277.10/30,415.65 = 7,130.80/x
  3. Step 3: Cross multiply
    20,277.10x = 30,415.65 × 7,130.80
  4. Step 4: Simplify right side
    20,277.10x = 216,887,917.02
  5. Step 5: Solve for x
    x = 216,887,917.02/20,277.10
  6. Step 6: Final answer
    x = 10,696.20

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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.