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Finding the Third Proportional to 7,312 and 9,724

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Solution

The third proportional to 7,312 and 9,724 is: 12,931.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312 : 9,724 = 9,724 : x
  2. Step 2: Convert to fraction form
    7,312/9,724 = 9,724/x
  3. Step 3: Cross multiply
    7,312x = 9,724 × 9,724
  4. Step 4: Simplify right side
    7,312x = 94,556,176
  5. Step 5: Solve for x
    x = 94,556,176/7,312
  6. Step 6: Final answer
    x = 12,931.64

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.