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Finding the Fourth Proportional to 8,999.52, 13,478.40 and 8,688.16

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Solution

The fourth proportional to 8,999.52, 13,478.40 and 8,688.16 is: 13,012.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.52 : 13,478.40 = 8,688.16 : x
  2. Step 2: Convert to fraction form
    8,999.52/13,478.40 = 8,688.16/x
  3. Step 3: Cross multiply
    8,999.52x = 13,478.40 × 8,688.16
  4. Step 4: Simplify right side
    8,999.52x = 117,102,495.74
  5. Step 5: Solve for x
    x = 117,102,495.74/8,999.52
  6. Step 6: Final answer
    x = 13,012.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.