Home / 15,485.30-21,368.91-8,411.71

Finding the Fourth Proportional to 15,485.30, 21,368.91 and 8,411.71

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Solution

The fourth proportional to 15,485.30, 21,368.91 and 8,411.71 is: 11,607.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.30 : 21,368.91 = 8,411.71 : x
  2. Step 2: Convert to fraction form
    15,485.30/21,368.91 = 8,411.71/x
  3. Step 3: Cross multiply
    15,485.30x = 21,368.91 × 8,411.71
  4. Step 4: Simplify right side
    15,485.30x = 179,749,073.94
  5. Step 5: Solve for x
    x = 179,749,073.94/15,485.30
  6. Step 6: Final answer
    x = 11,607.72

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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.