Home / 21,312,138.60-31,968,207.90-18,657,930.60

Finding the Fourth Proportional to 21,312,138.60, 31,968,207.90 and 18,657,930.60

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Solution

The fourth proportional to 21,312,138.60, 31,968,207.90 and 18,657,930.60 is: 27,986,895.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312,138.60 : 31,968,207.90 = 18,657,930.60 : x
  2. Step 2: Convert to fraction form
    21,312,138.60/31,968,207.90 = 18,657,930.60/x
  3. Step 3: Cross multiply
    21,312,138.60x = 31,968,207.90 × 18,657,930.60
  4. Step 4: Simplify right side
    21,312,138.60x = 596,460,604,404,571.75
  5. Step 5: Solve for x
    x = 596,460,604,404,571.75/21,312,138.60
  6. Step 6: Final answer
    x = 27,986,895.90

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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.