Home / 10,120.65-15,180.90-7,784.81

Finding the Fourth Proportional to 10,120.65, 15,180.90 and 7,784.81

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Solution

The fourth proportional to 10,120.65, 15,180.90 and 7,784.81 is: 11,677.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.65 : 15,180.90 = 7,784.81 : x
  2. Step 2: Convert to fraction form
    10,120.65/15,180.90 = 7,784.81/x
  3. Step 3: Cross multiply
    10,120.65x = 15,180.90 × 7,784.81
  4. Step 4: Simplify right side
    10,120.65x = 118,180,422.13
  5. Step 5: Solve for x
    x = 118,180,422.13/10,120.65
  6. Step 6: Final answer
    x = 11,677.16

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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.