Home / 21,683,969.20-29,924,815.80-12,980,457.64

Finding the Fourth Proportional to 21,683,969.20, 29,924,815.80 and 12,980,457.64

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Solution

The fourth proportional to 21,683,969.20, 29,924,815.80 and 12,980,457.64 is: 17,913,593.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,683,969.20 : 29,924,815.80 = 12,980,457.64 : x
  2. Step 2: Convert to fraction form
    21,683,969.20/29,924,815.80 = 12,980,457.64/x
  3. Step 3: Cross multiply
    21,683,969.20x = 29,924,815.80 × 12,980,457.64
  4. Step 4: Simplify right side
    21,683,969.20x = 388,437,803,876,702.75
  5. Step 5: Solve for x
    x = 388,437,803,876,702.75/21,683,969.20
  6. Step 6: Final answer
    x = 17,913,593.23

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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.