Home / 31,215.19-43,064.70-19,881.67

Finding the Fourth Proportional to 31,215.19, 43,064.70 and 19,881.67

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Solution

The fourth proportional to 31,215.19, 43,064.70 and 19,881.67 is: 27,428.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,215.19 : 43,064.70 = 19,881.67 : x
  2. Step 2: Convert to fraction form
    31,215.19/43,064.70 = 19,881.67/x
  3. Step 3: Cross multiply
    31,215.19x = 43,064.70 × 19,881.67
  4. Step 4: Simplify right side
    31,215.19x = 856,198,154.05
  5. Step 5: Solve for x
    x = 856,198,154.05/31,215.19
  6. Step 6: Final answer
    x = 27,428.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.