Home / 21,559.72-29,742.63-15,581.92

Finding the Fourth Proportional to 21,559.72, 29,742.63 and 15,581.92

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Solution

The fourth proportional to 21,559.72, 29,742.63 and 15,581.92 is: 21,495.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,559.72 : 29,742.63 = 15,581.92 : x
  2. Step 2: Convert to fraction form
    21,559.72/29,742.63 = 15,581.92/x
  3. Step 3: Cross multiply
    21,559.72x = 29,742.63 × 15,581.92
  4. Step 4: Simplify right side
    21,559.72x = 463,447,281.25
  5. Step 5: Solve for x
    x = 463,447,281.25/21,559.72
  6. Step 6: Final answer
    x = 21,495.98

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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.