Home / 12,909.78-19,364.87-5,012.76

Finding the Fourth Proportional to 12,909.78, 19,364.87 and 5,012.76

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Solution

The fourth proportional to 12,909.78, 19,364.87 and 5,012.76 is: 7,519.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.78 : 19,364.87 = 5,012.76 : x
  2. Step 2: Convert to fraction form
    12,909.78/19,364.87 = 5,012.76/x
  3. Step 3: Cross multiply
    12,909.78x = 19,364.87 × 5,012.76
  4. Step 4: Simplify right side
    12,909.78x = 97,071,445.74
  5. Step 5: Solve for x
    x = 97,071,445.74/12,909.78
  6. Step 6: Final answer
    x = 7,519.22

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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.