Home / 30,089.20-45,138.20-9,030.90

Finding the Fourth Proportional to 30,089.20, 45,138.20 and 9,030.90

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Solution

The fourth proportional to 30,089.20, 45,138.20 and 9,030.90 is: 13,547.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,089.20 : 45,138.20 = 9,030.90 : x
  2. Step 2: Convert to fraction form
    30,089.20/45,138.20 = 9,030.90/x
  3. Step 3: Cross multiply
    30,089.20x = 45,138.20 × 9,030.90
  4. Step 4: Simplify right side
    30,089.20x = 407,638,757.98
  5. Step 5: Solve for x
    x = 407,638,757.98/30,089.20
  6. Step 6: Final answer
    x = 13,547.68

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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.