Home / 13,220.84-19,830.81-5,320.91

Finding the Fourth Proportional to 13,220.84, 19,830.81 and 5,320.91

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Solution

The fourth proportional to 13,220.84, 19,830.81 and 5,320.91 is: 7,981.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.84 : 19,830.81 = 5,320.91 : x
  2. Step 2: Convert to fraction form
    13,220.84/19,830.81 = 5,320.91/x
  3. Step 3: Cross multiply
    13,220.84x = 19,830.81 × 5,320.91
  4. Step 4: Simplify right side
    13,220.84x = 105,517,955.24
  5. Step 5: Solve for x
    x = 105,517,955.24/13,220.84
  6. Step 6: Final answer
    x = 7,981.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.