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Finding the Fourth Proportional to 11,089.59, 15,300 and 7,903.40

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Solution

The fourth proportional to 11,089.59, 15,300 and 7,903.40 is: 10,904.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,089.59 : 15,300 = 7,903.40 : x
  2. Step 2: Convert to fraction form
    11,089.59/15,300 = 7,903.40/x
  3. Step 3: Cross multiply
    11,089.59x = 15,300 × 7,903.40
  4. Step 4: Simplify right side
    11,089.59x = 120,921,943.50
  5. Step 5: Solve for x
    x = 120,921,943.50/11,089.59
  6. Step 6: Final answer
    x = 10,904.10

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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.