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Finding the Fourth Proportional to 15,501.80, 21,741.40 and 15,501.80

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Solution

The fourth proportional to 15,501.80, 21,741.40 and 15,501.80 is: 21,741.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.80 : 21,741.40 = 15,501.80 : x
  2. Step 2: Convert to fraction form
    15,501.80/21,741.40 = 15,501.80/x
  3. Step 3: Cross multiply
    15,501.80x = 21,741.40 × 15,501.80
  4. Step 4: Simplify right side
    15,501.80x = 337,030,834.52
  5. Step 5: Solve for x
    x = 337,030,834.52/15,501.80
  6. Step 6: Final answer
    x = 21,741.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.