Home / 12,148.86-18,219.77-5,130.46

Finding the Fourth Proportional to 12,148.86, 18,219.77 and 5,130.46

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Solution

The fourth proportional to 12,148.86, 18,219.77 and 5,130.46 is: 7,694.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,148.86 : 18,219.77 = 5,130.46 : x
  2. Step 2: Convert to fraction form
    12,148.86/18,219.77 = 5,130.46/x
  3. Step 3: Cross multiply
    12,148.86x = 18,219.77 × 5,130.46
  4. Step 4: Simplify right side
    12,148.86x = 93,475,801.19
  5. Step 5: Solve for x
    x = 93,475,801.19/12,148.86
  6. Step 6: Final answer
    x = 7,694.20

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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.