Home / 12,991,211.80-19,478,523.30-5,421,189.40

Finding the Fourth Proportional to 12,991,211.80, 19,478,523.30 and 5,421,189.40

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Solution

The fourth proportional to 12,991,211.80, 19,478,523.30 and 5,421,189.40 is: 8,128,322.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991,211.80 : 19,478,523.30 = 5,421,189.40 : x
  2. Step 2: Convert to fraction form
    12,991,211.80/19,478,523.30 = 5,421,189.40/x
  3. Step 3: Cross multiply
    12,991,211.80x = 19,478,523.30 × 5,421,189.40
  4. Step 4: Simplify right side
    12,991,211.80x = 105,596,764,041,613.03
  5. Step 5: Solve for x
    x = 105,596,764,041,613.03/12,991,211.80
  6. Step 6: Final answer
    x = 8,128,322.87

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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.