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Finding the Fourth Proportional to 12,960.51, 17,886.41 and 7,295.79

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Solution

The fourth proportional to 12,960.51, 17,886.41 and 7,295.79 is: 10,068.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,960.51 : 17,886.41 = 7,295.79 : x
  2. Step 2: Convert to fraction form
    12,960.51/17,886.41 = 7,295.79/x
  3. Step 3: Cross multiply
    12,960.51x = 17,886.41 × 7,295.79
  4. Step 4: Simplify right side
    12,960.51x = 130,495,491.21
  5. Step 5: Solve for x
    x = 130,495,491.21/12,960.51
  6. Step 6: Final answer
    x = 10,068.70

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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.