Home / 28,689.64-39,580.59-21,153.85

Finding the Fourth Proportional to 28,689.64, 39,580.59 and 21,153.85

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Solution

The fourth proportional to 28,689.64, 39,580.59 and 21,153.85 is: 29,184.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.64 : 39,580.59 = 21,153.85 : x
  2. Step 2: Convert to fraction form
    28,689.64/39,580.59 = 21,153.85/x
  3. Step 3: Cross multiply
    28,689.64x = 39,580.59 × 21,153.85
  4. Step 4: Simplify right side
    28,689.64x = 837,281,863.77
  5. Step 5: Solve for x
    x = 837,281,863.77/28,689.64
  6. Step 6: Final answer
    x = 29,184.12

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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.