Home / 30,587.90-42,226.16-20,512.68

Finding the Fourth Proportional to 30,587.90, 42,226.16 and 20,512.68

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Solution

The fourth proportional to 30,587.90, 42,226.16 and 20,512.68 is: 28,317.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,587.90 : 42,226.16 = 20,512.68 : x
  2. Step 2: Convert to fraction form
    30,587.90/42,226.16 = 20,512.68/x
  3. Step 3: Cross multiply
    30,587.90x = 42,226.16 × 20,512.68
  4. Step 4: Simplify right side
    30,587.90x = 866,171,707.71
  5. Step 5: Solve for x
    x = 866,171,707.71/30,587.90
  6. Step 6: Final answer
    x = 28,317.46

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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.