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Finding the Fourth Proportional to 30,006.60, 45,009.90 and 8,946.60

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Solution

The fourth proportional to 30,006.60, 45,009.90 and 8,946.60 is: 13,419.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,006.60 : 45,009.90 = 8,946.60 : x
  2. Step 2: Convert to fraction form
    30,006.60/45,009.90 = 8,946.60/x
  3. Step 3: Cross multiply
    30,006.60x = 45,009.90 × 8,946.60
  4. Step 4: Simplify right side
    30,006.60x = 402,685,571.34
  5. Step 5: Solve for x
    x = 402,685,571.34/30,006.60
  6. Step 6: Final answer
    x = 13,419.90

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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.