Home / 10,491.80-14,475.17-7,128.81

Finding the Fourth Proportional to 10,491.80, 14,475.17 and 7,128.81

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Solution

The fourth proportional to 10,491.80, 14,475.17 and 7,128.81 is: 9,835.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,491.80 : 14,475.17 = 7,128.81 : x
  2. Step 2: Convert to fraction form
    10,491.80/14,475.17 = 7,128.81/x
  3. Step 3: Cross multiply
    10,491.80x = 14,475.17 × 7,128.81
  4. Step 4: Simplify right side
    10,491.80x = 103,190,754.47
  5. Step 5: Solve for x
    x = 103,190,754.47/10,491.80
  6. Step 6: Final answer
    x = 9,835.38

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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.