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Finding the Fourth Proportional to 15,483.94, 21,356.95 and 9,518.90

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Solution

The fourth proportional to 15,483.94, 21,356.95 and 9,518.90 is: 13,129.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,483.94 : 21,356.95 = 9,518.90 : x
  2. Step 2: Convert to fraction form
    15,483.94/21,356.95 = 9,518.90/x
  3. Step 3: Cross multiply
    15,483.94x = 21,356.95 × 9,518.90
  4. Step 4: Simplify right side
    15,483.94x = 203,294,671.36
  5. Step 5: Solve for x
    x = 203,294,671.36/15,483.94
  6. Step 6: Final answer
    x = 13,129.39

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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.