Home / 30,772.64-42,449.95-21,196.05

Finding the Fourth Proportional to 30,772.64, 42,449.95 and 21,196.05

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Solution

The fourth proportional to 30,772.64, 42,449.95 and 21,196.05 is: 29,239.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,772.64 : 42,449.95 = 21,196.05 : x
  2. Step 2: Convert to fraction form
    30,772.64/42,449.95 = 21,196.05/x
  3. Step 3: Cross multiply
    30,772.64x = 42,449.95 × 21,196.05
  4. Step 4: Simplify right side
    30,772.64x = 899,771,262.70
  5. Step 5: Solve for x
    x = 899,771,262.70/30,772.64
  6. Step 6: Final answer
    x = 29,239.33

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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.