Home / 30,962.66-42,746.19-20,383.05

Finding the Fourth Proportional to 30,962.66, 42,746.19 and 20,383.05

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Solution

The fourth proportional to 30,962.66, 42,746.19 and 20,383.05 is: 28,140.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,962.66 : 42,746.19 = 20,383.05 : x
  2. Step 2: Convert to fraction form
    30,962.66/42,746.19 = 20,383.05/x
  3. Step 3: Cross multiply
    30,962.66x = 42,746.19 × 20,383.05
  4. Step 4: Simplify right side
    30,962.66x = 871,297,728.08
  5. Step 5: Solve for x
    x = 871,297,728.08/30,962.66
  6. Step 6: Final answer
    x = 28,140.27

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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.