Home / 10,390.20-15,585.30-7,798.20

Finding the Fourth Proportional to 10,390.20, 15,585.30 and 7,798.20

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Solution

The fourth proportional to 10,390.20, 15,585.30 and 7,798.20 is: 11,697.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,390.20 : 15,585.30 = 7,798.20 : x
  2. Step 2: Convert to fraction form
    10,390.20/15,585.30 = 7,798.20/x
  3. Step 3: Cross multiply
    10,390.20x = 15,585.30 × 7,798.20
  4. Step 4: Simplify right side
    10,390.20x = 121,537,286.46
  5. Step 5: Solve for x
    x = 121,537,286.46/10,390.20
  6. Step 6: Final answer
    x = 11,697.30

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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.