Home / 21,285.13-29,362.95-12,783.16

Finding the Fourth Proportional to 21,285.13, 29,362.95 and 12,783.16

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Solution

The fourth proportional to 21,285.13, 29,362.95 and 12,783.16 is: 17,634.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.13 : 29,362.95 = 12,783.16 : x
  2. Step 2: Convert to fraction form
    21,285.13/29,362.95 = 12,783.16/x
  3. Step 3: Cross multiply
    21,285.13x = 29,362.95 × 12,783.16
  4. Step 4: Simplify right side
    21,285.13x = 375,351,287.92
  5. Step 5: Solve for x
    x = 375,351,287.92/21,285.13
  6. Step 6: Final answer
    x = 17,634.44

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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.