Home / 12,128,547.40-18,150,830.70-11,120,777.80

Finding the Fourth Proportional to 12,128,547.40, 18,150,830.70 and 11,120,777.80

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Solution

The fourth proportional to 12,128,547.40, 18,150,830.70 and 11,120,777.80 is: 16,642,665.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,547.40 : 18,150,830.70 = 11,120,777.80 : x
  2. Step 2: Convert to fraction form
    12,128,547.40/18,150,830.70 = 11,120,777.80/x
  3. Step 3: Cross multiply
    12,128,547.40x = 18,150,830.70 × 11,120,777.80
  4. Step 4: Simplify right side
    12,128,547.40x = 201,851,355,100,118.47
  5. Step 5: Solve for x
    x = 201,851,355,100,118.47/12,128,547.40
  6. Step 6: Final answer
    x = 16,642,665.31

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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.