Home / 12,913.60-19,370.40-5,518.30

Finding the Fourth Proportional to 12,913.60, 19,370.40 and 5,518.30

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Solution

The fourth proportional to 12,913.60, 19,370.40 and 5,518.30 is: 8,277.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,913.60 : 19,370.40 = 5,518.30 : x
  2. Step 2: Convert to fraction form
    12,913.60/19,370.40 = 5,518.30/x
  3. Step 3: Cross multiply
    12,913.60x = 19,370.40 × 5,518.30
  4. Step 4: Simplify right side
    12,913.60x = 106,891,678.32
  5. Step 5: Solve for x
    x = 106,891,678.32/12,913.60
  6. Step 6: Final answer
    x = 8,277.45

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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.