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Finding the Fourth Proportional to 13,870.51, 20,799.36 and 5,543.51

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Solution

The fourth proportional to 13,870.51, 20,799.36 and 5,543.51 is: 8,312.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.51 : 20,799.36 = 5,543.51 : x
  2. Step 2: Convert to fraction form
    13,870.51/20,799.36 = 5,543.51/x
  3. Step 3: Cross multiply
    13,870.51x = 20,799.36 × 5,543.51
  4. Step 4: Simplify right side
    13,870.51x = 115,301,356.16
  5. Step 5: Solve for x
    x = 115,301,356.16/13,870.51
  6. Step 6: Final answer
    x = 8,312.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.