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Finding the Fourth Proportional to 30,261.70, 45,392.87 and 9,205.17

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Solution

The fourth proportional to 30,261.70, 45,392.87 and 9,205.17 is: 13,807.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,261.70 : 45,392.87 = 9,205.17 : x
  2. Step 2: Convert to fraction form
    30,261.70/45,392.87 = 9,205.17/x
  3. Step 3: Cross multiply
    30,261.70x = 45,392.87 × 9,205.17
  4. Step 4: Simplify right side
    30,261.70x = 417,849,085.14
  5. Step 5: Solve for x
    x = 417,849,085.14/30,261.70
  6. Step 6: Final answer
    x = 13,807.85

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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.