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Finding the Fourth Proportional to 8,904.20, 13,416.47 and 7,378.16

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Solution

The fourth proportional to 8,904.20, 13,416.47 and 7,378.16 is: 11,117.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,904.20 : 13,416.47 = 7,378.16 : x
  2. Step 2: Convert to fraction form
    8,904.20/13,416.47 = 7,378.16/x
  3. Step 3: Cross multiply
    8,904.20x = 13,416.47 × 7,378.16
  4. Step 4: Simplify right side
    8,904.20x = 98,988,862.30
  5. Step 5: Solve for x
    x = 98,988,862.30/8,904.20
  6. Step 6: Final answer
    x = 11,117.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.