Home / 15,880.19-21,864.78-13,485.12

Finding the Fourth Proportional to 15,880.19, 21,864.78 and 13,485.12

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Solution

The fourth proportional to 15,880.19, 21,864.78 and 13,485.12 is: 18,567.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,880.19 : 21,864.78 = 13,485.12 : x
  2. Step 2: Convert to fraction form
    15,880.19/21,864.78 = 13,485.12/x
  3. Step 3: Cross multiply
    15,880.19x = 21,864.78 × 13,485.12
  4. Step 4: Simplify right side
    15,880.19x = 294,849,182.07
  5. Step 5: Solve for x
    x = 294,849,182.07/15,880.19
  6. Step 6: Final answer
    x = 18,567.11

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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.