Home / 12,289.90-18,437.60-6,740.40

Finding the Fourth Proportional to 12,289.90, 18,437.60 and 6,740.40

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Solution

The fourth proportional to 12,289.90, 18,437.60 and 6,740.40 is: 10,112.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,289.90 : 18,437.60 = 6,740.40 : x
  2. Step 2: Convert to fraction form
    12,289.90/18,437.60 = 6,740.40/x
  3. Step 3: Cross multiply
    12,289.90x = 18,437.60 × 6,740.40
  4. Step 4: Simplify right side
    12,289.90x = 124,276,799.04
  5. Step 5: Solve for x
    x = 124,276,799.04/12,289.90
  6. Step 6: Final answer
    x = 10,112.11

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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.