Home / 30,907.32-42,636.40-19,557.68

Finding the Fourth Proportional to 30,907.32, 42,636.40 and 19,557.68

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Solution

The fourth proportional to 30,907.32, 42,636.40 and 19,557.68 is: 26,979.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,907.32 : 42,636.40 = 19,557.68 : x
  2. Step 2: Convert to fraction form
    30,907.32/42,636.40 = 19,557.68/x
  3. Step 3: Cross multiply
    30,907.32x = 42,636.40 × 19,557.68
  4. Step 4: Simplify right side
    30,907.32x = 833,869,067.55
  5. Step 5: Solve for x
    x = 833,869,067.55/30,907.32
  6. Step 6: Final answer
    x = 26,979.66

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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.