Home / 30,140.47-45,211.73-12,128.47

Finding the Fourth Proportional to 30,140.47, 45,211.73 and 12,128.47

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Solution

The fourth proportional to 30,140.47, 45,211.73 and 12,128.47 is: 18,193.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,140.47 : 45,211.73 = 12,128.47 : x
  2. Step 2: Convert to fraction form
    30,140.47/45,211.73 = 12,128.47/x
  3. Step 3: Cross multiply
    30,140.47x = 45,211.73 × 12,128.47
  4. Step 4: Simplify right side
    30,140.47x = 548,349,223.98
  5. Step 5: Solve for x
    x = 548,349,223.98/30,140.47
  6. Step 6: Final answer
    x = 18,193.12

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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.