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Finding the Fourth Proportional to 43,303.98, 64,957.80 and 13,721.16

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Solution

The fourth proportional to 43,303.98, 64,957.80 and 13,721.16 is: 20,582.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,303.98 : 64,957.80 = 13,721.16 : x
  2. Step 2: Convert to fraction form
    43,303.98/64,957.80 = 13,721.16/x
  3. Step 3: Cross multiply
    43,303.98x = 64,957.80 × 13,721.16
  4. Step 4: Simplify right side
    43,303.98x = 891,296,298.44
  5. Step 5: Solve for x
    x = 891,296,298.44/43,303.98
  6. Step 6: Final answer
    x = 20,582.32

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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.