Home / 15,309.81-21,126.02-9,342.95

Finding the Fourth Proportional to 15,309.81, 21,126.02 and 9,342.95

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Solution

The fourth proportional to 15,309.81, 21,126.02 and 9,342.95 is: 12,892.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.81 : 21,126.02 = 9,342.95 : x
  2. Step 2: Convert to fraction form
    15,309.81/21,126.02 = 9,342.95/x
  3. Step 3: Cross multiply
    15,309.81x = 21,126.02 × 9,342.95
  4. Step 4: Simplify right side
    15,309.81x = 197,379,196.21
  5. Step 5: Solve for x
    x = 197,379,196.21/15,309.81
  6. Step 6: Final answer
    x = 12,892.33

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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.