Home / 12,128,445.70-18,192,668.55-8,071,779.40

Finding the Fourth Proportional to 12,128,445.70, 18,192,668.55 and 8,071,779.40

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Solution

The fourth proportional to 12,128,445.70, 18,192,668.55 and 8,071,779.40 is: 12,107,669.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,445.70 : 18,192,668.55 = 8,071,779.40 : x
  2. Step 2: Convert to fraction form
    12,128,445.70/18,192,668.55 = 8,071,779.40/x
  3. Step 3: Cross multiply
    12,128,445.70x = 18,192,668.55 × 8,071,779.40
  4. Step 4: Simplify right side
    12,128,445.70x = 146,847,207,232,917.88
  5. Step 5: Solve for x
    x = 146,847,207,232,917.88/12,128,445.70
  6. Step 6: Final answer
    x = 12,107,669.10

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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.