Home / 30,703.48-42,376.88-19,961.68

Finding the Fourth Proportional to 30,703.48, 42,376.88 and 19,961.68

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Solution

The fourth proportional to 30,703.48, 42,376.88 and 19,961.68 is: 27,551.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,703.48 : 42,376.88 = 19,961.68 : x
  2. Step 2: Convert to fraction form
    30,703.48/42,376.88 = 19,961.68/x
  3. Step 3: Cross multiply
    30,703.48x = 42,376.88 × 19,961.68
  4. Step 4: Simplify right side
    30,703.48x = 845,913,717.96
  5. Step 5: Solve for x
    x = 845,913,717.96/30,703.48
  6. Step 6: Final answer
    x = 27,551.07

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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.