Home / 28,560.98-39,389.99-21,407.67

Finding the Fourth Proportional to 28,560.98, 39,389.99 and 21,407.67

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Solution

The fourth proportional to 28,560.98, 39,389.99 and 21,407.67 is: 29,524.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,560.98 : 39,389.99 = 21,407.67 : x
  2. Step 2: Convert to fraction form
    28,560.98/39,389.99 = 21,407.67/x
  3. Step 3: Cross multiply
    28,560.98x = 39,389.99 × 21,407.67
  4. Step 4: Simplify right side
    28,560.98x = 843,247,800.18
  5. Step 5: Solve for x
    x = 843,247,800.18/28,560.98
  6. Step 6: Final answer
    x = 29,524.47

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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.