Home / 20,912,979.20-31,369,468.80-7,450,246.40

Finding the Fourth Proportional to 20,912,979.20, 31,369,468.80 and 7,450,246.40

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Solution

The fourth proportional to 20,912,979.20, 31,369,468.80 and 7,450,246.40 is: 11,175,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912,979.20 : 31,369,468.80 = 7,450,246.40 : x
  2. Step 2: Convert to fraction form
    20,912,979.20/31,369,468.80 = 7,450,246.40/x
  3. Step 3: Cross multiply
    20,912,979.20x = 31,369,468.80 × 7,450,246.40
  4. Step 4: Simplify right side
    20,912,979.20x = 233,710,271,997,112.34
  5. Step 5: Solve for x
    x = 233,710,271,997,112.34/20,912,979.20
  6. Step 6: Final answer
    x = 11,175,369.60

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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.