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Finding the Fourth Proportional to 10,555.89, 14,560.79 and 6,970.89

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Solution

The fourth proportional to 10,555.89, 14,560.79 and 6,970.89 is: 9,615.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,555.89 : 14,560.79 = 6,970.89 : x
  2. Step 2: Convert to fraction form
    10,555.89/14,560.79 = 6,970.89/x
  3. Step 3: Cross multiply
    10,555.89x = 14,560.79 × 6,970.89
  4. Step 4: Simplify right side
    10,555.89x = 101,501,630.55
  5. Step 5: Solve for x
    x = 101,501,630.55/10,555.89
  6. Step 6: Final answer
    x = 9,615.64

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1.5x scale

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.