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Finding the Fourth Proportional to 21,865,367.60, 32,798,051.40 and 20,689,636.40

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Solution

The fourth proportional to 21,865,367.60, 32,798,051.40 and 20,689,636.40 is: 31,034,454.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,865,367.60 : 32,798,051.40 = 20,689,636.40 : x
  2. Step 2: Convert to fraction form
    21,865,367.60/32,798,051.40 = 20,689,636.40/x
  3. Step 3: Cross multiply
    21,865,367.60x = 32,798,051.40 × 20,689,636.40
  4. Step 4: Simplify right side
    21,865,367.60x = 678,579,758,094,510.88
  5. Step 5: Solve for x
    x = 678,579,758,094,510.88/21,865,367.60
  6. Step 6: Final answer
    x = 31,034,454.60

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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.