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Finding the Fourth Proportional to 13,802.81, 19,047.81 and 7,752.21

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Solution

The fourth proportional to 13,802.81, 19,047.81 and 7,752.21 is: 10,698.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,802.81 : 19,047.81 = 7,752.21 : x
  2. Step 2: Convert to fraction form
    13,802.81/19,047.81 = 7,752.21/x
  3. Step 3: Cross multiply
    13,802.81x = 19,047.81 × 7,752.21
  4. Step 4: Simplify right side
    13,802.81x = 147,662,623.16
  5. Step 5: Solve for x
    x = 147,662,623.16/13,802.81
  6. Step 6: Final answer
    x = 10,698.01

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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.