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Finding the Fourth Proportional to 15,571.58, 21,492.21 and 9,905.22

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Solution

The fourth proportional to 15,571.58, 21,492.21 and 9,905.22 is: 13,671.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,571.58 : 21,492.21 = 9,905.22 : x
  2. Step 2: Convert to fraction form
    15,571.58/21,492.21 = 9,905.22/x
  3. Step 3: Cross multiply
    15,571.58x = 21,492.21 × 9,905.22
  4. Step 4: Simplify right side
    15,571.58x = 212,885,068.34
  5. Step 5: Solve for x
    x = 212,885,068.34/15,571.58
  6. Step 6: Final answer
    x = 13,671.39

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1.5x scale

Why These Related Problems?

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