Home / 13,750.02-18,970.61-8,640.61

Finding the Fourth Proportional to 13,750.02, 18,970.61 and 8,640.61

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Solution

The fourth proportional to 13,750.02, 18,970.61 and 8,640.61 is: 11,921.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.02 : 18,970.61 = 8,640.61 : x
  2. Step 2: Convert to fraction form
    13,750.02/18,970.61 = 8,640.61/x
  3. Step 3: Cross multiply
    13,750.02x = 18,970.61 × 8,640.61
  4. Step 4: Simplify right side
    13,750.02x = 163,917,551.84
  5. Step 5: Solve for x
    x = 163,917,551.84/13,750.02
  6. Step 6: Final answer
    x = 11,921.26

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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.