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Finding the Fourth Proportional to 64,860, 97,290 and 15,612

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Solution

The fourth proportional to 64,860, 97,290 and 15,612 is: 23,418

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,860 : 97,290 = 15,612 : x
  2. Step 2: Convert to fraction form
    64,860/97,290 = 15,612/x
  3. Step 3: Cross multiply
    64,860x = 97,290 × 15,612
  4. Step 4: Simplify right side
    64,860x = 1,518,891,480
  5. Step 5: Solve for x
    x = 1,518,891,480/64,860
  6. Step 6: Final answer
    x = 23,418

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.