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Finding the Fourth Proportional to 15,153.14, 20,908.14 and 8,779.34

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Solution

The fourth proportional to 15,153.14, 20,908.14 and 8,779.34 is: 12,113.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.14 : 20,908.14 = 8,779.34 : x
  2. Step 2: Convert to fraction form
    15,153.14/20,908.14 = 8,779.34/x
  3. Step 3: Cross multiply
    15,153.14x = 20,908.14 × 8,779.34
  4. Step 4: Simplify right side
    15,153.14x = 183,559,669.83
  5. Step 5: Solve for x
    x = 183,559,669.83/15,153.14
  6. Step 6: Final answer
    x = 12,113.64

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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.