Home / 12,528,090.70-18,792,136.05-7,489,242.70

Finding the Fourth Proportional to 12,528,090.70, 18,792,136.05 and 7,489,242.70

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Solution

The fourth proportional to 12,528,090.70, 18,792,136.05 and 7,489,242.70 is: 11,233,864.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,528,090.70 : 18,792,136.05 = 7,489,242.70 : x
  2. Step 2: Convert to fraction form
    12,528,090.70/18,792,136.05 = 7,489,242.70/x
  3. Step 3: Cross multiply
    12,528,090.70x = 18,792,136.05 × 7,489,242.70
  4. Step 4: Simplify right side
    12,528,090.70x = 140,738,867,729,869.34
  5. Step 5: Solve for x
    x = 140,738,867,729,869.34/12,528,090.70
  6. Step 6: Final answer
    x = 11,233,864.05

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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.