Home / 12,909.95-19,316.01-7,647.78

Finding the Fourth Proportional to 12,909.95, 19,316.01 and 7,647.78

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Solution

The fourth proportional to 12,909.95, 19,316.01 and 7,647.78 is: 11,442.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.95 : 19,316.01 = 7,647.78 : x
  2. Step 2: Convert to fraction form
    12,909.95/19,316.01 = 7,647.78/x
  3. Step 3: Cross multiply
    12,909.95x = 19,316.01 × 7,647.78
  4. Step 4: Simplify right side
    12,909.95x = 147,724,594.96
  5. Step 5: Solve for x
    x = 147,724,594.96/12,909.95
  6. Step 6: Final answer
    x = 11,442.70

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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.