Home / 12,455,689.60-18,683,534.40-7,647,788.80

Finding the Fourth Proportional to 12,455,689.60, 18,683,534.40 and 7,647,788.80

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Solution

The fourth proportional to 12,455,689.60, 18,683,534.40 and 7,647,788.80 is: 11,471,683.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455,689.60 : 18,683,534.40 = 7,647,788.80 : x
  2. Step 2: Convert to fraction form
    12,455,689.60/18,683,534.40 = 7,647,788.80/x
  3. Step 3: Cross multiply
    12,455,689.60x = 18,683,534.40 × 7,647,788.80
  4. Step 4: Simplify right side
    12,455,689.60x = 142,887,725,128,734.72
  5. Step 5: Solve for x
    x = 142,887,725,128,734.72/12,455,689.60
  6. Step 6: Final answer
    x = 11,471,683.20

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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.