Home / 30,090.20-45,139.70-9,031.90

Finding the Fourth Proportional to 30,090.20, 45,139.70 and 9,031.90

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Solution

The fourth proportional to 30,090.20, 45,139.70 and 9,031.90 is: 13,549.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,090.20 : 45,139.70 = 9,031.90 : x
  2. Step 2: Convert to fraction form
    30,090.20/45,139.70 = 9,031.90/x
  3. Step 3: Cross multiply
    30,090.20x = 45,139.70 × 9,031.90
  4. Step 4: Simplify right side
    30,090.20x = 407,697,256.43
  5. Step 5: Solve for x
    x = 407,697,256.43/30,090.20
  6. Step 6: Final answer
    x = 13,549.17

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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.