Home / 30,865.32-42,594.96-18,921.80

Finding the Fourth Proportional to 30,865.32, 42,594.96 and 18,921.80

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Solution

The fourth proportional to 30,865.32, 42,594.96 and 18,921.80 is: 26,112.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,865.32 : 42,594.96 = 18,921.80 : x
  2. Step 2: Convert to fraction form
    30,865.32/42,594.96 = 18,921.80/x
  3. Step 3: Cross multiply
    30,865.32x = 42,594.96 × 18,921.80
  4. Step 4: Simplify right side
    30,865.32x = 805,973,314.13
  5. Step 5: Solve for x
    x = 805,973,314.13/30,865.32
  6. Step 6: Final answer
    x = 26,112.59

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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.