Home / 30,129.68-45,209.64-12,599.12

Finding the Fourth Proportional to 30,129.68, 45,209.64 and 12,599.12

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Solution

The fourth proportional to 30,129.68, 45,209.64 and 12,599.12 is: 18,905.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,129.68 : 45,209.64 = 12,599.12 : x
  2. Step 2: Convert to fraction form
    30,129.68/45,209.64 = 12,599.12/x
  3. Step 3: Cross multiply
    30,129.68x = 45,209.64 × 12,599.12
  4. Step 4: Simplify right side
    30,129.68x = 569,601,679.52
  5. Step 5: Solve for x
    x = 569,601,679.52/30,129.68
  6. Step 6: Final answer
    x = 18,905.00

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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.