Home / 6,420.34-8,857.47-3,901.51

Finding the Fourth Proportional to 6,420.34, 8,857.47 and 3,901.51

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Solution

The fourth proportional to 6,420.34, 8,857.47 and 3,901.51 is: 5,382.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.34 : 8,857.47 = 3,901.51 : x
  2. Step 2: Convert to fraction form
    6,420.34/8,857.47 = 3,901.51/x
  3. Step 3: Cross multiply
    6,420.34x = 8,857.47 × 3,901.51
  4. Step 4: Simplify right side
    6,420.34x = 34,557,507.78
  5. Step 5: Solve for x
    x = 34,557,507.78/6,420.34
  6. Step 6: Final answer
    x = 5,382.50

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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.