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Finding the Fourth Proportional to 8,710, 12,019.80 and 4,984

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Solution

The fourth proportional to 8,710, 12,019.80 and 4,984 is: 6,877.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,710 : 12,019.80 = 4,984 : x
  2. Step 2: Convert to fraction form
    8,710/12,019.80 = 4,984/x
  3. Step 3: Cross multiply
    8,710x = 12,019.80 × 4,984
  4. Step 4: Simplify right side
    8,710x = 59,906,683.20
  5. Step 5: Solve for x
    x = 59,906,683.20/8,710
  6. Step 6: Final answer
    x = 6,877.92

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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.