Home / 21,915.04-30,245.70-12,356.81

Finding the Fourth Proportional to 21,915.04, 30,245.70 and 12,356.81

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Solution

The fourth proportional to 21,915.04, 30,245.70 and 12,356.81 is: 17,054.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.04 : 30,245.70 = 12,356.81 : x
  2. Step 2: Convert to fraction form
    21,915.04/30,245.70 = 12,356.81/x
  3. Step 3: Cross multiply
    21,915.04x = 30,245.70 × 12,356.81
  4. Step 4: Simplify right side
    21,915.04x = 373,740,368.22
  5. Step 5: Solve for x
    x = 373,740,368.22/21,915.04
  6. Step 6: Final answer
    x = 17,054.06

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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.