Home / 15,311.94-21,132.77-9,347.06

Finding the Fourth Proportional to 15,311.94, 21,132.77 and 9,347.06

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Solution

The fourth proportional to 15,311.94, 21,132.77 and 9,347.06 is: 12,900.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.94 : 21,132.77 = 9,347.06 : x
  2. Step 2: Convert to fraction form
    15,311.94/21,132.77 = 9,347.06/x
  3. Step 3: Cross multiply
    15,311.94x = 21,132.77 × 9,347.06
  4. Step 4: Simplify right side
    15,311.94x = 197,529,275.25
  5. Step 5: Solve for x
    x = 197,529,275.25/15,311.94
  6. Step 6: Final answer
    x = 12,900.35

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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.