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Finding the Fourth Proportional to 10,602.60, 15,903.90 and 9,911.40

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Solution

The fourth proportional to 10,602.60, 15,903.90 and 9,911.40 is: 14,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,602.60 : 15,903.90 = 9,911.40 : x
  2. Step 2: Convert to fraction form
    10,602.60/15,903.90 = 9,911.40/x
  3. Step 3: Cross multiply
    10,602.60x = 15,903.90 × 9,911.40
  4. Step 4: Simplify right side
    10,602.60x = 157,629,914.46
  5. Step 5: Solve for x
    x = 157,629,914.46/10,602.60
  6. Step 6: Final answer
    x = 14,867.10

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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.