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Finding the Fourth Proportional to 15,405.60, 21,265.80 and 10,384.14

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Solution

The fourth proportional to 15,405.60, 21,265.80 and 10,384.14 is: 14,334.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.60 : 21,265.80 = 10,384.14 : x
  2. Step 2: Convert to fraction form
    15,405.60/21,265.80 = 10,384.14/x
  3. Step 3: Cross multiply
    15,405.60x = 21,265.80 × 10,384.14
  4. Step 4: Simplify right side
    15,405.60x = 220,827,044.41
  5. Step 5: Solve for x
    x = 220,827,044.41/15,405.60
  6. Step 6: Final answer
    x = 14,334.21

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.