Home / 31,869.19-47,809.47-13,138.81

Finding the Fourth Proportional to 31,869.19, 47,809.47 and 13,138.81

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Solution

The fourth proportional to 31,869.19, 47,809.47 and 13,138.81 is: 19,710.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,869.19 : 47,809.47 = 13,138.81 : x
  2. Step 2: Convert to fraction form
    31,869.19/47,809.47 = 13,138.81/x
  3. Step 3: Cross multiply
    31,869.19x = 47,809.47 × 13,138.81
  4. Step 4: Simplify right side
    31,869.19x = 628,159,472.28
  5. Step 5: Solve for x
    x = 628,159,472.28/31,869.19
  6. Step 6: Final answer
    x = 19,710.56

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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.