Home / 30,927.70-42,699.55-21,253.82

Finding the Fourth Proportional to 30,927.70, 42,699.55 and 21,253.82

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Solution

The fourth proportional to 30,927.70, 42,699.55 and 21,253.82 is: 29,343.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,927.70 : 42,699.55 = 21,253.82 : x
  2. Step 2: Convert to fraction form
    30,927.70/42,699.55 = 21,253.82/x
  3. Step 3: Cross multiply
    30,927.70x = 42,699.55 × 21,253.82
  4. Step 4: Simplify right side
    30,927.70x = 907,528,523.33
  5. Step 5: Solve for x
    x = 907,528,523.33/30,927.70
  6. Step 6: Final answer
    x = 29,343.55

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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.