Home / 15,312.09-21,132.18-9,347.75

Finding the Fourth Proportional to 15,312.09, 21,132.18 and 9,347.75

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Solution

The fourth proportional to 15,312.09, 21,132.18 and 9,347.75 is: 12,900.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.09 : 21,132.18 = 9,347.75 : x
  2. Step 2: Convert to fraction form
    15,312.09/21,132.18 = 9,347.75/x
  3. Step 3: Cross multiply
    15,312.09x = 21,132.18 × 9,347.75
  4. Step 4: Simplify right side
    15,312.09x = 197,538,229.93
  5. Step 5: Solve for x
    x = 197,538,229.93/15,312.09
  6. Step 6: Final answer
    x = 12,900.80

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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.