Home / 7,905.20-10,901.40-5,663.12

Finding the Fourth Proportional to 7,905.20, 10,901.40 and 5,663.12

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Solution

The fourth proportional to 7,905.20, 10,901.40 and 5,663.12 is: 7,809.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,905.20 : 10,901.40 = 5,663.12 : x
  2. Step 2: Convert to fraction form
    7,905.20/10,901.40 = 5,663.12/x
  3. Step 3: Cross multiply
    7,905.20x = 10,901.40 × 5,663.12
  4. Step 4: Simplify right side
    7,905.20x = 61,735,936.37
  5. Step 5: Solve for x
    x = 61,735,936.37/7,905.20
  6. Step 6: Final answer
    x = 7,809.54

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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.