Home / 13,128,971.86-18,103,698.21-8,536,777.30

Finding the Fourth Proportional to 13,128,971.86, 18,103,698.21 and 8,536,777.30

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Solution

The fourth proportional to 13,128,971.86, 18,103,698.21 and 8,536,777.30 is: 11,771,465.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128,971.86 : 18,103,698.21 = 8,536,777.30 : x
  2. Step 2: Convert to fraction form
    13,128,971.86/18,103,698.21 = 8,536,777.30/x
  3. Step 3: Cross multiply
    13,128,971.86x = 18,103,698.21 × 8,536,777.30
  4. Step 4: Simplify right side
    13,128,971.86x = 154,547,239,925,178.66
  5. Step 5: Solve for x
    x = 154,547,239,925,178.66/13,128,971.86
  6. Step 6: Final answer
    x = 11,771,465.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.