Home / 21,558.87-29,756.48-20,319.57

Finding the Fourth Proportional to 21,558.87, 29,756.48 and 20,319.57

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Solution

The fourth proportional to 21,558.87, 29,756.48 and 20,319.57 is: 28,045.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,558.87 : 29,756.48 = 20,319.57 : x
  2. Step 2: Convert to fraction form
    21,558.87/29,756.48 = 20,319.57/x
  3. Step 3: Cross multiply
    21,558.87x = 29,756.48 × 20,319.57
  4. Step 4: Simplify right side
    21,558.87x = 604,638,878.31
  5. Step 5: Solve for x
    x = 604,638,878.31/21,558.87
  6. Step 6: Final answer
    x = 28,045.94

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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.