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Finding the Fourth Proportional to 12,345.88, 17,036.88 and 7,042.39

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Solution

The fourth proportional to 12,345.88, 17,036.88 and 7,042.39 is: 9,718.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.88 : 17,036.88 = 7,042.39 : x
  2. Step 2: Convert to fraction form
    12,345.88/17,036.88 = 7,042.39/x
  3. Step 3: Cross multiply
    12,345.88x = 17,036.88 × 7,042.39
  4. Step 4: Simplify right side
    12,345.88x = 119,980,353.34
  5. Step 5: Solve for x
    x = 119,980,353.34/12,345.88
  6. Step 6: Final answer
    x = 9,718.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.