Home / 15,420.55-21,280.77-9,368.73

Finding the Fourth Proportional to 15,420.55, 21,280.77 and 9,368.73

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Solution

The fourth proportional to 15,420.55, 21,280.77 and 9,368.73 is: 12,929.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.55 : 21,280.77 = 9,368.73 : x
  2. Step 2: Convert to fraction form
    15,420.55/21,280.77 = 9,368.73/x
  3. Step 3: Cross multiply
    15,420.55x = 21,280.77 × 9,368.73
  4. Step 4: Simplify right side
    15,420.55x = 199,373,635.07
  5. Step 5: Solve for x
    x = 199,373,635.07/15,420.55
  6. Step 6: Final answer
    x = 12,929.09

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Double scale
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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.