Home / 20,779,818.70-31,106,742.45-15,698,980.30

Finding the Fourth Proportional to 20,779,818.70, 31,106,742.45 and 15,698,980.30

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Solution

The fourth proportional to 20,779,818.70, 31,106,742.45 and 15,698,980.30 is: 23,500,885.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779,818.70 : 31,106,742.45 = 15,698,980.30 : x
  2. Step 2: Convert to fraction form
    20,779,818.70/31,106,742.45 = 15,698,980.30/x
  3. Step 3: Cross multiply
    20,779,818.70x = 31,106,742.45 × 15,698,980.30
  4. Step 4: Simplify right side
    20,779,818.70x = 488,344,136,919,723.75
  5. Step 5: Solve for x
    x = 488,344,136,919,723.75/20,779,818.70
  6. Step 6: Final answer
    x = 23,500,885.35

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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.