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Finding the Fourth Proportional to 21,063,580.80, 31,559,941.80 and 18,016,652.40

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Solution

The fourth proportional to 21,063,580.80, 31,559,941.80 and 18,016,652.40 is: 26,994,674.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063,580.80 : 31,559,941.80 = 18,016,652.40 : x
  2. Step 2: Convert to fraction form
    21,063,580.80/31,559,941.80 = 18,016,652.40/x
  3. Step 3: Cross multiply
    21,063,580.80x = 31,559,941.80 × 18,016,652.40
  4. Step 4: Simplify right side
    21,063,580.80x = 568,604,501,174,830.25
  5. Step 5: Solve for x
    x = 568,604,501,174,830.25/21,063,580.80
  6. Step 6: Final answer
    x = 26,994,674.20

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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.