Home / 20,805,909.87-28,717,925.72-12,105,762.87

Finding the Fourth Proportional to 20,805,909.87, 28,717,925.72 and 12,105,762.87

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Solution

The fourth proportional to 20,805,909.87, 28,717,925.72 and 12,105,762.87 is: 16,709,310.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805,909.87 : 28,717,925.72 = 12,105,762.87 : x
  2. Step 2: Convert to fraction form
    20,805,909.87/28,717,925.72 = 12,105,762.87/x
  3. Step 3: Cross multiply
    20,805,909.87x = 28,717,925.72 × 12,105,762.87
  4. Step 4: Simplify right side
    20,805,909.87x = 347,652,398,824,065.19
  5. Step 5: Solve for x
    x = 347,652,398,824,065.19/20,805,909.87
  6. Step 6: Final answer
    x = 16,709,310.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.