Home / 12,858.40-19,266.90-7,295.20

Finding the Fourth Proportional to 12,858.40, 19,266.90 and 7,295.20

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Solution

The fourth proportional to 12,858.40, 19,266.90 and 7,295.20 is: 10,931.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,858.40 : 19,266.90 = 7,295.20 : x
  2. Step 2: Convert to fraction form
    12,858.40/19,266.90 = 7,295.20/x
  3. Step 3: Cross multiply
    12,858.40x = 19,266.90 × 7,295.20
  4. Step 4: Simplify right side
    12,858.40x = 140,555,888.88
  5. Step 5: Solve for x
    x = 140,555,888.88/12,858.40
  6. Step 6: Final answer
    x = 10,931.06

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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.