Home / 15,686,890.67-21,648,434.79-8,717,861.91

Finding the Fourth Proportional to 15,686,890.67, 21,648,434.79 and 8,717,861.91

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Solution

The fourth proportional to 15,686,890.67, 21,648,434.79 and 8,717,861.91 is: 12,030,941.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686,890.67 : 21,648,434.79 = 8,717,861.91 : x
  2. Step 2: Convert to fraction form
    15,686,890.67/21,648,434.79 = 8,717,861.91/x
  3. Step 3: Cross multiply
    15,686,890.67x = 21,648,434.79 × 8,717,861.91
  4. Step 4: Simplify right side
    15,686,890.67x = 188,728,065,066,859.84
  5. Step 5: Solve for x
    x = 188,728,065,066,859.84/15,686,890.67
  6. Step 6: Final answer
    x = 12,030,941.57

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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.