Home / 10,890.45-15,018.92-7,112.41

Finding the Fourth Proportional to 10,890.45, 15,018.92 and 7,112.41

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Solution

The fourth proportional to 10,890.45, 15,018.92 and 7,112.41 is: 9,808.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890.45 : 15,018.92 = 7,112.41 : x
  2. Step 2: Convert to fraction form
    10,890.45/15,018.92 = 7,112.41/x
  3. Step 3: Cross multiply
    10,890.45x = 15,018.92 × 7,112.41
  4. Step 4: Simplify right side
    10,890.45x = 106,820,670.36
  5. Step 5: Solve for x
    x = 106,820,670.36/10,890.45
  6. Step 6: Final answer
    x = 9,808.66

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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.