Home / 12,905.40-19,347.30-6,749.40

Finding the Fourth Proportional to 12,905.40, 19,347.30 and 6,749.40

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Solution

The fourth proportional to 12,905.40, 19,347.30 and 6,749.40 is: 10,118.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.40 : 19,347.30 = 6,749.40 : x
  2. Step 2: Convert to fraction form
    12,905.40/19,347.30 = 6,749.40/x
  3. Step 3: Cross multiply
    12,905.40x = 19,347.30 × 6,749.40
  4. Step 4: Simplify right side
    12,905.40x = 130,582,666.62
  5. Step 5: Solve for x
    x = 130,582,666.62/12,905.40
  6. Step 6: Final answer
    x = 10,118.45

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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.