Home / 31,109.78-46,667.71-12,385.45

Finding the Fourth Proportional to 31,109.78, 46,667.71 and 12,385.45

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Solution

The fourth proportional to 31,109.78, 46,667.71 and 12,385.45 is: 18,579.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,109.78 : 46,667.71 = 12,385.45 : x
  2. Step 2: Convert to fraction form
    31,109.78/46,667.71 = 12,385.45/x
  3. Step 3: Cross multiply
    31,109.78x = 46,667.71 × 12,385.45
  4. Step 4: Simplify right side
    31,109.78x = 578,000,441.19
  5. Step 5: Solve for x
    x = 578,000,441.19/31,109.78
  6. Step 6: Final answer
    x = 18,579.38

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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.