Home / 13,528.60-18,669.33-7,478.81

Finding the Fourth Proportional to 13,528.60, 18,669.33 and 7,478.81

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Solution

The fourth proportional to 13,528.60, 18,669.33 and 7,478.81 is: 10,320.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,528.60 : 18,669.33 = 7,478.81 : x
  2. Step 2: Convert to fraction form
    13,528.60/18,669.33 = 7,478.81/x
  3. Step 3: Cross multiply
    13,528.60x = 18,669.33 × 7,478.81
  4. Step 4: Simplify right side
    13,528.60x = 139,624,381.18
  5. Step 5: Solve for x
    x = 139,624,381.18/13,528.60
  6. Step 6: Final answer
    x = 10,320.68

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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.