Home / 28,520.86-42,740.73-13,511.98

Finding the Fourth Proportional to 28,520.86, 42,740.73 and 13,511.98

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Solution

The fourth proportional to 28,520.86, 42,740.73 and 13,511.98 is: 20,248.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.86 : 42,740.73 = 13,511.98 : x
  2. Step 2: Convert to fraction form
    28,520.86/42,740.73 = 13,511.98/x
  3. Step 3: Cross multiply
    28,520.86x = 42,740.73 × 13,511.98
  4. Step 4: Simplify right side
    28,520.86x = 577,511,888.95
  5. Step 5: Solve for x
    x = 577,511,888.95/28,520.86
  6. Step 6: Final answer
    x = 20,248.75

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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.