Home / 30,582.64-42,164.58-20,512.72

Finding the Fourth Proportional to 30,582.64, 42,164.58 and 20,512.72

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Solution

The fourth proportional to 30,582.64, 42,164.58 and 20,512.72 is: 28,281.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,582.64 : 42,164.58 = 20,512.72 : x
  2. Step 2: Convert to fraction form
    30,582.64/42,164.58 = 20,512.72/x
  3. Step 3: Cross multiply
    30,582.64x = 42,164.58 × 20,512.72
  4. Step 4: Simplify right side
    30,582.64x = 864,910,223.46
  5. Step 5: Solve for x
    x = 864,910,223.46/30,582.64
  6. Step 6: Final answer
    x = 28,281.08

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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.