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Finding the Fourth Proportional to 30,090.89, 45,143.63 and 9,030.89

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Solution

The fourth proportional to 30,090.89, 45,143.63 and 9,030.89 is: 13,548.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,090.89 : 45,143.63 = 9,030.89 : x
  2. Step 2: Convert to fraction form
    30,090.89/45,143.63 = 9,030.89/x
  3. Step 3: Cross multiply
    30,090.89x = 45,143.63 × 9,030.89
  4. Step 4: Simplify right side
    30,090.89x = 407,687,258.30
  5. Step 5: Solve for x
    x = 407,687,258.30/30,090.89
  6. Step 6: Final answer
    x = 13,548.53

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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.