Home / 12,929.76-19,403.15-7,090.47

Finding the Fourth Proportional to 12,929.76, 19,403.15 and 7,090.47

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Solution

The fourth proportional to 12,929.76, 19,403.15 and 7,090.47 is: 10,640.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,929.76 : 19,403.15 = 7,090.47 : x
  2. Step 2: Convert to fraction form
    12,929.76/19,403.15 = 7,090.47/x
  3. Step 3: Cross multiply
    12,929.76x = 19,403.15 × 7,090.47
  4. Step 4: Simplify right side
    12,929.76x = 137,577,417.53
  5. Step 5: Solve for x
    x = 137,577,417.53/12,929.76
  6. Step 6: Final answer
    x = 10,640.37

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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.