Home / 12,985.07-17,920.73-7,952.62

Finding the Fourth Proportional to 12,985.07, 17,920.73 and 7,952.62

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Solution

The fourth proportional to 12,985.07, 17,920.73 and 7,952.62 is: 10,975.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.07 : 17,920.73 = 7,952.62 : x
  2. Step 2: Convert to fraction form
    12,985.07/17,920.73 = 7,952.62/x
  3. Step 3: Cross multiply
    12,985.07x = 17,920.73 × 7,952.62
  4. Step 4: Simplify right side
    12,985.07x = 142,516,755.81
  5. Step 5: Solve for x
    x = 142,516,755.81/12,985.07
  6. Step 6: Final answer
    x = 10,975.43

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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.