Home / 15,319.67-21,143.43-9,354.78

Finding the Fourth Proportional to 15,319.67, 21,143.43 and 9,354.78

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Solution

The fourth proportional to 15,319.67, 21,143.43 and 9,354.78 is: 12,911.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.67 : 21,143.43 = 9,354.78 : x
  2. Step 2: Convert to fraction form
    15,319.67/21,143.43 = 9,354.78/x
  3. Step 3: Cross multiply
    15,319.67x = 21,143.43 × 9,354.78
  4. Step 4: Simplify right side
    15,319.67x = 197,792,136.10
  5. Step 5: Solve for x
    x = 197,792,136.10/15,319.67
  6. Step 6: Final answer
    x = 12,911.00

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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.