Home / 39,289.72-54,219.86-21,384.70

Finding the Fourth Proportional to 39,289.72, 54,219.86 and 21,384.70

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Solution

The fourth proportional to 39,289.72, 54,219.86 and 21,384.70 is: 29,510.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,289.72 : 54,219.86 = 21,384.70 : x
  2. Step 2: Convert to fraction form
    39,289.72/54,219.86 = 21,384.70/x
  3. Step 3: Cross multiply
    39,289.72x = 54,219.86 × 21,384.70
  4. Step 4: Simplify right side
    39,289.72x = 1,159,475,440.14
  5. Step 5: Solve for x
    x = 1,159,475,440.14/39,289.72
  6. Step 6: Final answer
    x = 29,510.91

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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.