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Finding the Fourth Proportional to 42,995.88, 64,490.76 and 11,405.25

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Solution

The fourth proportional to 42,995.88, 64,490.76 and 11,405.25 is: 17,107.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,995.88 : 64,490.76 = 11,405.25 : x
  2. Step 2: Convert to fraction form
    42,995.88/64,490.76 = 11,405.25/x
  3. Step 3: Cross multiply
    42,995.88x = 64,490.76 × 11,405.25
  4. Step 4: Simplify right side
    42,995.88x = 735,533,240.49
  5. Step 5: Solve for x
    x = 735,533,240.49/42,995.88
  6. Step 6: Final answer
    x = 17,107.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.