Home / 30,615.94-42,212.48-21,036.88

Finding the Fourth Proportional to 30,615.94, 42,212.48 and 21,036.88

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Solution

The fourth proportional to 30,615.94, 42,212.48 and 21,036.88 is: 29,005.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,615.94 : 42,212.48 = 21,036.88 : x
  2. Step 2: Convert to fraction form
    30,615.94/42,212.48 = 21,036.88/x
  3. Step 3: Cross multiply
    30,615.94x = 42,212.48 × 21,036.88
  4. Step 4: Simplify right side
    30,615.94x = 888,018,823.84
  5. Step 5: Solve for x
    x = 888,018,823.84/30,615.94
  6. Step 6: Final answer
    x = 29,005.11

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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.