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Finding the Fourth Proportional to 14,485.60, 21,728.40 and 13,506.40

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Solution

The fourth proportional to 14,485.60, 21,728.40 and 13,506.40 is: 20,259.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,485.60 : 21,728.40 = 13,506.40 : x
  2. Step 2: Convert to fraction form
    14,485.60/21,728.40 = 13,506.40/x
  3. Step 3: Cross multiply
    14,485.60x = 21,728.40 × 13,506.40
  4. Step 4: Simplify right side
    14,485.60x = 293,472,461.76
  5. Step 5: Solve for x
    x = 293,472,461.76/14,485.60
  6. Step 6: Final answer
    x = 20,259.60

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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.