Home / 15,289.56-21,098.88-9,000.72

Finding the Fourth Proportional to 15,289.56, 21,098.88 and 9,000.72

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Solution

The fourth proportional to 15,289.56, 21,098.88 and 9,000.72 is: 12,420.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,289.56 : 21,098.88 = 9,000.72 : x
  2. Step 2: Convert to fraction form
    15,289.56/21,098.88 = 9,000.72/x
  3. Step 3: Cross multiply
    15,289.56x = 21,098.88 × 9,000.72
  4. Step 4: Simplify right side
    15,289.56x = 189,905,111.19
  5. Step 5: Solve for x
    x = 189,905,111.19/15,289.56
  6. Step 6: Final answer
    x = 12,420.57

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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.