Home / 30,448.92-42,038.16-20,904.48

Finding the Fourth Proportional to 30,448.92, 42,038.16 and 20,904.48

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Solution

The fourth proportional to 30,448.92, 42,038.16 and 20,904.48 is: 28,860.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,448.92 : 42,038.16 = 20,904.48 : x
  2. Step 2: Convert to fraction form
    30,448.92/42,038.16 = 20,904.48/x
  3. Step 3: Cross multiply
    30,448.92x = 42,038.16 × 20,904.48
  4. Step 4: Simplify right side
    30,448.92x = 878,785,874.96
  5. Step 5: Solve for x
    x = 878,785,874.96/30,448.92
  6. Step 6: Final answer
    x = 28,860.99

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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.