Home / 15,780.21-21,775.70-8,706.63

Finding the Fourth Proportional to 15,780.21, 21,775.70 and 8,706.63

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Solution

The fourth proportional to 15,780.21, 21,775.70 and 8,706.63 is: 12,014.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.21 : 21,775.70 = 8,706.63 : x
  2. Step 2: Convert to fraction form
    15,780.21/21,775.70 = 8,706.63/x
  3. Step 3: Cross multiply
    15,780.21x = 21,775.70 × 8,706.63
  4. Step 4: Simplify right side
    15,780.21x = 189,592,962.89
  5. Step 5: Solve for x
    x = 189,592,962.89/15,780.21
  6. Step 6: Final answer
    x = 12,014.60

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