Home / 28,011.40-42,017.10-21,790.60

Finding the Fourth Proportional to 28,011.40, 42,017.10 and 21,790.60

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Solution

The fourth proportional to 28,011.40, 42,017.10 and 21,790.60 is: 32,685.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,011.40 : 42,017.10 = 21,790.60 : x
  2. Step 2: Convert to fraction form
    28,011.40/42,017.10 = 21,790.60/x
  3. Step 3: Cross multiply
    28,011.40x = 42,017.10 × 21,790.60
  4. Step 4: Simplify right side
    28,011.40x = 915,577,819.26
  5. Step 5: Solve for x
    x = 915,577,819.26/28,011.40
  6. Step 6: Final answer
    x = 32,685.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.