Home / 10,991.30-15,172.53-7,851.74

Finding the Fourth Proportional to 10,991.30, 15,172.53 and 7,851.74

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Solution

The fourth proportional to 10,991.30, 15,172.53 and 7,851.74 is: 10,838.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.30 : 15,172.53 = 7,851.74 : x
  2. Step 2: Convert to fraction form
    10,991.30/15,172.53 = 7,851.74/x
  3. Step 3: Cross multiply
    10,991.30x = 15,172.53 × 7,851.74
  4. Step 4: Simplify right side
    10,991.30x = 119,130,760.70
  5. Step 5: Solve for x
    x = 119,130,760.70/10,991.30
  6. Step 6: Final answer
    x = 10,838.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.