Home / 28,625.12-42,900.72-12,818.60

Finding the Fourth Proportional to 28,625.12, 42,900.72 and 12,818.60

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Solution

The fourth proportional to 28,625.12, 42,900.72 and 12,818.60 is: 19,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,625.12 : 42,900.72 = 12,818.60 : x
  2. Step 2: Convert to fraction form
    28,625.12/42,900.72 = 12,818.60/x
  3. Step 3: Cross multiply
    28,625.12x = 42,900.72 × 12,818.60
  4. Step 4: Simplify right side
    28,625.12x = 549,927,169.39
  5. Step 5: Solve for x
    x = 549,927,169.39/28,625.12
  6. Step 6: Final answer
    x = 19,211.35

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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.