Home / 20,762,291.40-31,134,105.90-7,978,547.40

Finding the Fourth Proportional to 20,762,291.40, 31,134,105.90 and 7,978,547.40

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Solution

The fourth proportional to 20,762,291.40, 31,134,105.90 and 7,978,547.40 is: 11,964,235.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762,291.40 : 31,134,105.90 = 7,978,547.40 : x
  2. Step 2: Convert to fraction form
    20,762,291.40/31,134,105.90 = 7,978,547.40/x
  3. Step 3: Cross multiply
    20,762,291.40x = 31,134,105.90 × 7,978,547.40
  4. Step 4: Simplify right side
    20,762,291.40x = 248,404,939,679,769.66
  5. Step 5: Solve for x
    x = 248,404,939,679,769.66/20,762,291.40
  6. Step 6: Final answer
    x = 11,964,235.30

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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.