Home / 30,937.11-42,666.86-20,852.30

Finding the Fourth Proportional to 30,937.11, 42,666.86 and 20,852.30

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Solution

The fourth proportional to 30,937.11, 42,666.86 and 20,852.30 is: 28,758.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,937.11 : 42,666.86 = 20,852.30 : x
  2. Step 2: Convert to fraction form
    30,937.11/42,666.86 = 20,852.30/x
  3. Step 3: Cross multiply
    30,937.11x = 42,666.86 × 20,852.30
  4. Step 4: Simplify right side
    30,937.11x = 889,701,847.18
  5. Step 5: Solve for x
    x = 889,701,847.18/30,937.11
  6. Step 6: Final answer
    x = 28,758.40

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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.