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Finding the Fourth Proportional to 12,623.71, 17,420.70 and 7,034.71

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Solution

The fourth proportional to 12,623.71, 17,420.70 and 7,034.71 is: 9,707.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,623.71 : 17,420.70 = 7,034.71 : x
  2. Step 2: Convert to fraction form
    12,623.71/17,420.70 = 7,034.71/x
  3. Step 3: Cross multiply
    12,623.71x = 17,420.70 × 7,034.71
  4. Step 4: Simplify right side
    12,623.71x = 122,549,572.50
  5. Step 5: Solve for x
    x = 122,549,572.50/12,623.71
  6. Step 6: Final answer
    x = 9,707.89

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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.