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Finding the Fourth Proportional to 30,047.60, 45,079.20 and 8,988.08

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Solution

The fourth proportional to 30,047.60, 45,079.20 and 8,988.08 is: 13,484.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,047.60 : 45,079.20 = 8,988.08 : x
  2. Step 2: Convert to fraction form
    30,047.60/45,079.20 = 8,988.08/x
  3. Step 3: Cross multiply
    30,047.60x = 45,079.20 × 8,988.08
  4. Step 4: Simplify right side
    30,047.60x = 405,175,455.94
  5. Step 5: Solve for x
    x = 405,175,455.94/30,047.60
  6. Step 6: Final answer
    x = 13,484.45

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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.