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Finding the Fourth Proportional to 20,742,406.60, 28,972,184.60 and 20,742,406.60

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Solution

The fourth proportional to 20,742,406.60, 28,972,184.60 and 20,742,406.60 is: 28,972,184.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742,406.60 : 28,972,184.60 = 20,742,406.60 : x
  2. Step 2: Convert to fraction form
    20,742,406.60/28,972,184.60 = 20,742,406.60/x
  3. Step 3: Cross multiply
    20,742,406.60x = 28,972,184.60 × 20,742,406.60
  4. Step 4: Simplify right side
    20,742,406.60x = 600,952,833,063,458.38
  5. Step 5: Solve for x
    x = 600,952,833,063,458.38/20,742,406.60
  6. Step 6: Final answer
    x = 28,972,184.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.