Home / 31,507.81-47,281.41-12,787.84

Finding the Fourth Proportional to 31,507.81, 47,281.41 and 12,787.84

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Solution

The fourth proportional to 31,507.81, 47,281.41 and 12,787.84 is: 19,189.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,507.81 : 47,281.41 = 12,787.84 : x
  2. Step 2: Convert to fraction form
    31,507.81/47,281.41 = 12,787.84/x
  3. Step 3: Cross multiply
    31,507.81x = 47,281.41 × 12,787.84
  4. Step 4: Simplify right side
    31,507.81x = 604,627,189.13
  5. Step 5: Solve for x
    x = 604,627,189.13/31,507.81
  6. Step 6: Final answer
    x = 19,189.76

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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.