Home / 28,689.85-39,580.90-21,154.02

Finding the Fourth Proportional to 28,689.85, 39,580.90 and 21,154.02

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Solution

The fourth proportional to 28,689.85, 39,580.90 and 21,154.02 is: 29,184.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.85 : 39,580.90 = 21,154.02 : x
  2. Step 2: Convert to fraction form
    28,689.85/39,580.90 = 21,154.02/x
  3. Step 3: Cross multiply
    28,689.85x = 39,580.90 × 21,154.02
  4. Step 4: Simplify right side
    28,689.85x = 837,295,150.22
  5. Step 5: Solve for x
    x = 837,295,150.22/28,689.85
  6. Step 6: Final answer
    x = 29,184.37

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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.