Home / 31,331.19-47,009.08-13,788.71

Finding the Fourth Proportional to 31,331.19, 47,009.08 and 13,788.71

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Solution

The fourth proportional to 31,331.19, 47,009.08 and 13,788.71 is: 20,688.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,331.19 : 47,009.08 = 13,788.71 : x
  2. Step 2: Convert to fraction form
    31,331.19/47,009.08 = 13,788.71/x
  3. Step 3: Cross multiply
    31,331.19x = 47,009.08 × 13,788.71
  4. Step 4: Simplify right side
    31,331.19x = 648,194,571.49
  5. Step 5: Solve for x
    x = 648,194,571.49/31,331.19
  6. Step 6: Final answer
    x = 20,688.48

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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.