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Finding the Fourth Proportional to 9,390.76, 12,959.06 and 5,411.63

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Solution

The fourth proportional to 9,390.76, 12,959.06 and 5,411.63 is: 7,467.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,390.76 : 12,959.06 = 5,411.63 : x
  2. Step 2: Convert to fraction form
    9,390.76/12,959.06 = 5,411.63/x
  3. Step 3: Cross multiply
    9,390.76x = 12,959.06 × 5,411.63
  4. Step 4: Simplify right side
    9,390.76x = 70,129,643.21
  5. Step 5: Solve for x
    x = 70,129,643.21/9,390.76
  6. Step 6: Final answer
    x = 7,467.94

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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.