Home / 12,345.60-18,518.40-11,713.80

Finding the Fourth Proportional to 12,345.60, 18,518.40 and 11,713.80

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Solution

The fourth proportional to 12,345.60, 18,518.40 and 11,713.80 is: 17,570.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.60 : 18,518.40 = 11,713.80 : x
  2. Step 2: Convert to fraction form
    12,345.60/18,518.40 = 11,713.80/x
  3. Step 3: Cross multiply
    12,345.60x = 18,518.40 × 11,713.80
  4. Step 4: Simplify right side
    12,345.60x = 216,920,833.92
  5. Step 5: Solve for x
    x = 216,920,833.92/12,345.60
  6. Step 6: Final answer
    x = 17,570.70

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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.