Home / 13,730.81-18,948.80-7,762.12

Finding the Fourth Proportional to 13,730.81, 18,948.80 and 7,762.12

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Solution

The fourth proportional to 13,730.81, 18,948.80 and 7,762.12 is: 10,711.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,730.81 : 18,948.80 = 7,762.12 : x
  2. Step 2: Convert to fraction form
    13,730.81/18,948.80 = 7,762.12/x
  3. Step 3: Cross multiply
    13,730.81x = 18,948.80 × 7,762.12
  4. Step 4: Simplify right side
    13,730.81x = 147,082,831.49
  5. Step 5: Solve for x
    x = 147,082,831.49/13,730.81
  6. Step 6: Final answer
    x = 10,711.89

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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.