Home / 30,677.70-42,321.36-19,339.32

Finding the Fourth Proportional to 30,677.70, 42,321.36 and 19,339.32

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Solution

The fourth proportional to 30,677.70, 42,321.36 and 19,339.32 is: 26,679.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,677.70 : 42,321.36 = 19,339.32 : x
  2. Step 2: Convert to fraction form
    30,677.70/42,321.36 = 19,339.32/x
  3. Step 3: Cross multiply
    30,677.70x = 42,321.36 × 19,339.32
  4. Step 4: Simplify right side
    30,677.70x = 818,466,323.88
  5. Step 5: Solve for x
    x = 818,466,323.88/30,677.70
  6. Step 6: Final answer
    x = 26,679.52

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Double scale
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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.