Home / 15,528.84-21,430.35-8,814.75

Finding the Fourth Proportional to 15,528.84, 21,430.35 and 8,814.75

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Solution

The fourth proportional to 15,528.84, 21,430.35 and 8,814.75 is: 12,164.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.84 : 21,430.35 = 8,814.75 : x
  2. Step 2: Convert to fraction form
    15,528.84/21,430.35 = 8,814.75/x
  3. Step 3: Cross multiply
    15,528.84x = 21,430.35 × 8,814.75
  4. Step 4: Simplify right side
    15,528.84x = 188,903,177.66
  5. Step 5: Solve for x
    x = 188,903,177.66/15,528.84
  6. Step 6: Final answer
    x = 12,164.67

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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.