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Finding the Fourth Proportional to 9,421.92, 12,985.92 and 7,059.96

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Solution

The fourth proportional to 9,421.92, 12,985.92 and 7,059.96 is: 9,730.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,421.92 : 12,985.92 = 7,059.96 : x
  2. Step 2: Convert to fraction form
    9,421.92/12,985.92 = 7,059.96/x
  3. Step 3: Cross multiply
    9,421.92x = 12,985.92 × 7,059.96
  4. Step 4: Simplify right side
    9,421.92x = 91,680,075.76
  5. Step 5: Solve for x
    x = 91,680,075.76/9,421.92
  6. Step 6: Final answer
    x = 9,730.51

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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.