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Finding the Fourth Proportional to 13,750.95, 18,980.07 and 12,816.01

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Solution

The fourth proportional to 13,750.95, 18,980.07 and 12,816.01 is: 17,689.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.95 : 18,980.07 = 12,816.01 : x
  2. Step 2: Convert to fraction form
    13,750.95/18,980.07 = 12,816.01/x
  3. Step 3: Cross multiply
    13,750.95x = 18,980.07 × 12,816.01
  4. Step 4: Simplify right side
    13,750.95x = 243,248,672.02
  5. Step 5: Solve for x
    x = 243,248,672.02/13,750.95
  6. Step 6: Final answer
    x = 17,689.60

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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.