Home / 15,289.61-21,099.86-9,239.01

Finding the Fourth Proportional to 15,289.61, 21,099.86 and 9,239.01

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Solution

The fourth proportional to 15,289.61, 21,099.86 and 9,239.01 is: 12,749.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,289.61 : 21,099.86 = 9,239.01 : x
  2. Step 2: Convert to fraction form
    15,289.61/21,099.86 = 9,239.01/x
  3. Step 3: Cross multiply
    15,289.61x = 21,099.86 × 9,239.01
  4. Step 4: Simplify right side
    15,289.61x = 194,941,665.84
  5. Step 5: Solve for x
    x = 194,941,665.84/15,289.61
  6. Step 6: Final answer
    x = 12,749.95

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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.