Home / 15,486.21-21,369.15-9,111.40

Finding the Fourth Proportional to 15,486.21, 21,369.15 and 9,111.40

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Solution

The fourth proportional to 15,486.21, 21,369.15 and 9,111.40 is: 12,572.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.21 : 21,369.15 = 9,111.40 : x
  2. Step 2: Convert to fraction form
    15,486.21/21,369.15 = 9,111.40/x
  3. Step 3: Cross multiply
    15,486.21x = 21,369.15 × 9,111.40
  4. Step 4: Simplify right side
    15,486.21x = 194,702,819.89
  5. Step 5: Solve for x
    x = 194,702,819.89/15,486.21
  6. Step 6: Final answer
    x = 12,572.66

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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.