Home / 30,898.16-42,637.14-20,840.24

Finding the Fourth Proportional to 30,898.16, 42,637.14 and 20,840.24

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Solution

The fourth proportional to 30,898.16, 42,637.14 and 20,840.24 is: 28,757.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,898.16 : 42,637.14 = 20,840.24 : x
  2. Step 2: Convert to fraction form
    30,898.16/42,637.14 = 20,840.24/x
  3. Step 3: Cross multiply
    30,898.16x = 42,637.14 × 20,840.24
  4. Step 4: Simplify right side
    30,898.16x = 888,568,230.51
  5. Step 5: Solve for x
    x = 888,568,230.51/30,898.16
  6. Step 6: Final answer
    x = 28,757.97

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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.