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Finding the Fourth Proportional to 14,904.95, 20,570.78 and 9,615.15

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Solution

The fourth proportional to 14,904.95, 20,570.78 and 9,615.15 is: 13,270.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,904.95 : 20,570.78 = 9,615.15 : x
  2. Step 2: Convert to fraction form
    14,904.95/20,570.78 = 9,615.15/x
  3. Step 3: Cross multiply
    14,904.95x = 20,570.78 × 9,615.15
  4. Step 4: Simplify right side
    14,904.95x = 197,790,984.39
  5. Step 5: Solve for x
    x = 197,790,984.39/14,904.95
  6. Step 6: Final answer
    x = 13,270.15

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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.