Home / 13,990.40-19,307.04-7,702.88

Finding the Fourth Proportional to 13,990.40, 19,307.04 and 7,702.88

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Solution

The fourth proportional to 13,990.40, 19,307.04 and 7,702.88 is: 10,630.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.40 : 19,307.04 = 7,702.88 : x
  2. Step 2: Convert to fraction form
    13,990.40/19,307.04 = 7,702.88/x
  3. Step 3: Cross multiply
    13,990.40x = 19,307.04 × 7,702.88
  4. Step 4: Simplify right side
    13,990.40x = 148,719,812.28
  5. Step 5: Solve for x
    x = 148,719,812.28/13,990.40
  6. Step 6: Final answer
    x = 10,630.13

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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.