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Finding the Fourth Proportional to 13,615.95, 18,798.72 and 9,085.11

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Solution

The fourth proportional to 13,615.95, 18,798.72 and 9,085.11 is: 12,543.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.95 : 18,798.72 = 9,085.11 : x
  2. Step 2: Convert to fraction form
    13,615.95/18,798.72 = 9,085.11/x
  3. Step 3: Cross multiply
    13,615.95x = 18,798.72 × 9,085.11
  4. Step 4: Simplify right side
    13,615.95x = 170,788,330.86
  5. Step 5: Solve for x
    x = 170,788,330.86/13,615.95
  6. Step 6: Final answer
    x = 12,543.25

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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.