Home / 42,970.91-64,456.36-13,388.72

Finding the Fourth Proportional to 42,970.91, 64,456.36 and 13,388.72

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Solution

The fourth proportional to 42,970.91, 64,456.36 and 13,388.72 is: 20,083.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,970.91 : 64,456.36 = 13,388.72 : x
  2. Step 2: Convert to fraction form
    42,970.91/64,456.36 = 13,388.72/x
  3. Step 3: Cross multiply
    42,970.91x = 64,456.36 × 13,388.72
  4. Step 4: Simplify right side
    42,970.91x = 862,987,800.51
  5. Step 5: Solve for x
    x = 862,987,800.51/42,970.91
  6. Step 6: Final answer
    x = 20,083.07

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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.