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Finding the Fourth Proportional to 18,684,926.29, 28,038,457.28 and 7,901,636.05

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Solution

The fourth proportional to 18,684,926.29, 28,038,457.28 and 7,901,636.05 is: 11,857,134.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,684,926.29 : 28,038,457.28 = 7,901,636.05 : x
  2. Step 2: Convert to fraction form
    18,684,926.29/28,038,457.28 = 7,901,636.05/x
  3. Step 3: Cross multiply
    18,684,926.29x = 28,038,457.28 × 7,901,636.05
  4. Step 4: Simplify right side
    18,684,926.29x = 221,549,684,830,032.94
  5. Step 5: Solve for x
    x = 221,549,684,830,032.94/18,684,926.29
  6. Step 6: Final answer
    x = 11,857,134.54

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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.