Home / 30,956.22-42,690.15-20,886.30

Finding the Fourth Proportional to 30,956.22, 42,690.15 and 20,886.30

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Solution

The fourth proportional to 30,956.22, 42,690.15 and 20,886.30 is: 28,803.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,956.22 : 42,690.15 = 20,886.30 : x
  2. Step 2: Convert to fraction form
    30,956.22/42,690.15 = 20,886.30/x
  3. Step 3: Cross multiply
    30,956.22x = 42,690.15 × 20,886.30
  4. Step 4: Simplify right side
    30,956.22x = 891,639,279.95
  5. Step 5: Solve for x
    x = 891,639,279.95/30,956.22
  6. Step 6: Final answer
    x = 28,803.24

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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.