Home / 12,430.72-17,153.60-6,840.64

Finding the Fourth Proportional to 12,430.72, 17,153.60 and 6,840.64

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Solution

The fourth proportional to 12,430.72, 17,153.60 and 6,840.64 is: 9,439.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,430.72 : 17,153.60 = 6,840.64 : x
  2. Step 2: Convert to fraction form
    12,430.72/17,153.60 = 6,840.64/x
  3. Step 3: Cross multiply
    12,430.72x = 17,153.60 × 6,840.64
  4. Step 4: Simplify right side
    12,430.72x = 117,341,602.30
  5. Step 5: Solve for x
    x = 117,341,602.30/12,430.72
  6. Step 6: Final answer
    x = 9,439.65

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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.