Home / 12,345.30-17,038.56-9,712.80

Finding the Fourth Proportional to 12,345.30, 17,038.56 and 9,712.80

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Solution

The fourth proportional to 12,345.30, 17,038.56 and 9,712.80 is: 13,405.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.30 : 17,038.56 = 9,712.80 : x
  2. Step 2: Convert to fraction form
    12,345.30/17,038.56 = 9,712.80/x
  3. Step 3: Cross multiply
    12,345.30x = 17,038.56 × 9,712.80
  4. Step 4: Simplify right side
    12,345.30x = 165,492,125.57
  5. Step 5: Solve for x
    x = 165,492,125.57/12,345.30
  6. Step 6: Final answer
    x = 13,405.27

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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.