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Finding the Fourth Proportional to 13,588.58, 18,750.40 and 7,921.98

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Solution

The fourth proportional to 13,588.58, 18,750.40 and 7,921.98 is: 10,931.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,588.58 : 18,750.40 = 7,921.98 : x
  2. Step 2: Convert to fraction form
    13,588.58/18,750.40 = 7,921.98/x
  3. Step 3: Cross multiply
    13,588.58x = 18,750.40 × 7,921.98
  4. Step 4: Simplify right side
    13,588.58x = 148,540,273.99
  5. Step 5: Solve for x
    x = 148,540,273.99/13,588.58
  6. Step 6: Final answer
    x = 10,931.26

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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.