Home / 15,509.88-21,394.04-13,525.20

Finding the Fourth Proportional to 15,509.88, 21,394.04 and 13,525.20

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Solution

The fourth proportional to 15,509.88, 21,394.04 and 13,525.20 is: 18,656.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.88 : 21,394.04 = 13,525.20 : x
  2. Step 2: Convert to fraction form
    15,509.88/21,394.04 = 13,525.20/x
  3. Step 3: Cross multiply
    15,509.88x = 21,394.04 × 13,525.20
  4. Step 4: Simplify right side
    15,509.88x = 289,358,602.18
  5. Step 5: Solve for x
    x = 289,358,602.18/15,509.88
  6. Step 6: Final answer
    x = 18,656.40

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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.