Home / 30,143.18-45,210.30-7,958.10

Finding the Fourth Proportional to 30,143.18, 45,210.30 and 7,958.10

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Solution

The fourth proportional to 30,143.18, 45,210.30 and 7,958.10 is: 11,935.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,143.18 : 45,210.30 = 7,958.10 : x
  2. Step 2: Convert to fraction form
    30,143.18/45,210.30 = 7,958.10/x
  3. Step 3: Cross multiply
    30,143.18x = 45,210.30 × 7,958.10
  4. Step 4: Simplify right side
    30,143.18x = 359,788,088.43
  5. Step 5: Solve for x
    x = 359,788,088.43/30,143.18
  6. Step 6: Final answer
    x = 11,935.97

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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.