Home / 42,721.16-64,081.74-13,138.34

Finding the Fourth Proportional to 42,721.16, 64,081.74 and 13,138.34

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Solution

The fourth proportional to 42,721.16, 64,081.74 and 13,138.34 is: 19,707.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,721.16 : 64,081.74 = 13,138.34 : x
  2. Step 2: Convert to fraction form
    42,721.16/64,081.74 = 13,138.34/x
  3. Step 3: Cross multiply
    42,721.16x = 64,081.74 × 13,138.34
  4. Step 4: Simplify right side
    42,721.16x = 841,927,687.91
  5. Step 5: Solve for x
    x = 841,927,687.91/42,721.16
  6. Step 6: Final answer
    x = 19,707.51

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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.