Home / 15,455.78-21,312.95-13,225.04

Finding the Fourth Proportional to 15,455.78, 21,312.95 and 13,225.04

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Solution

The fourth proportional to 15,455.78, 21,312.95 and 13,225.04 is: 18,236.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.78 : 21,312.95 = 13,225.04 : x
  2. Step 2: Convert to fraction form
    15,455.78/21,312.95 = 13,225.04/x
  3. Step 3: Cross multiply
    15,455.78x = 21,312.95 × 13,225.04
  4. Step 4: Simplify right side
    15,455.78x = 281,864,443.58
  5. Step 5: Solve for x
    x = 281,864,443.58/15,455.78
  6. Step 6: Final answer
    x = 18,236.84

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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.