Home / 12,890.49-19,341.45-8,209.28

Finding the Fourth Proportional to 12,890.49, 19,341.45 and 8,209.28

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Solution

The fourth proportional to 12,890.49, 19,341.45 and 8,209.28 is: 12,317.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.49 : 19,341.45 = 8,209.28 : x
  2. Step 2: Convert to fraction form
    12,890.49/19,341.45 = 8,209.28/x
  3. Step 3: Cross multiply
    12,890.49x = 19,341.45 × 8,209.28
  4. Step 4: Simplify right side
    12,890.49x = 158,779,403.53
  5. Step 5: Solve for x
    x = 158,779,403.53/12,890.49
  6. Step 6: Final answer
    x = 12,317.57

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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.