Home / 52,128.10-78,191.52-12,685.30

Finding the Fourth Proportional to 52,128.10, 78,191.52 and 12,685.30

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Solution

The fourth proportional to 52,128.10, 78,191.52 and 12,685.30 is: 19,027.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,128.10 : 78,191.52 = 12,685.30 : x
  2. Step 2: Convert to fraction form
    52,128.10/78,191.52 = 12,685.30/x
  3. Step 3: Cross multiply
    52,128.10x = 78,191.52 × 12,685.30
  4. Step 4: Simplify right side
    52,128.10x = 991,882,888.66
  5. Step 5: Solve for x
    x = 991,882,888.66/52,128.10
  6. Step 6: Final answer
    x = 19,027.80

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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.