Home / 20,298.09-30,428.69-7,810.15

Finding the Fourth Proportional to 20,298.09, 30,428.69 and 7,810.15

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Solution

The fourth proportional to 20,298.09, 30,428.69 and 7,810.15 is: 11,708.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,298.09 : 30,428.69 = 7,810.15 : x
  2. Step 2: Convert to fraction form
    20,298.09/30,428.69 = 7,810.15/x
  3. Step 3: Cross multiply
    20,298.09x = 30,428.69 × 7,810.15
  4. Step 4: Simplify right side
    20,298.09x = 237,652,704.08
  5. Step 5: Solve for x
    x = 237,652,704.08/20,298.09
  6. Step 6: Final answer
    x = 11,708.13

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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.