Home / 30,699.91-42,362.09-19,365.13

Finding the Fourth Proportional to 30,699.91, 42,362.09 and 19,365.13

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Solution

The fourth proportional to 30,699.91, 42,362.09 and 19,365.13 is: 26,721.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,699.91 : 42,362.09 = 19,365.13 : x
  2. Step 2: Convert to fraction form
    30,699.91/42,362.09 = 19,365.13/x
  3. Step 3: Cross multiply
    30,699.91x = 42,362.09 × 19,365.13
  4. Step 4: Simplify right side
    30,699.91x = 820,347,170.38
  5. Step 5: Solve for x
    x = 820,347,170.38/30,699.91
  6. Step 6: Final answer
    x = 26,721.48

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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.