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Finding the Fourth Proportional to 14,656.80, 21,985.20 and 13,015.20

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Solution

The fourth proportional to 14,656.80, 21,985.20 and 13,015.20 is: 19,522.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,656.80 : 21,985.20 = 13,015.20 : x
  2. Step 2: Convert to fraction form
    14,656.80/21,985.20 = 13,015.20/x
  3. Step 3: Cross multiply
    14,656.80x = 21,985.20 × 13,015.20
  4. Step 4: Simplify right side
    14,656.80x = 286,141,775.04
  5. Step 5: Solve for x
    x = 286,141,775.04/14,656.80
  6. Step 6: Final answer
    x = 19,522.80

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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.