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Finding the Fourth Proportional to 13,988.64, 19,303.92 and 7,700.88

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Solution

The fourth proportional to 13,988.64, 19,303.92 and 7,700.88 is: 10,626.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.64 : 19,303.92 = 7,700.88 : x
  2. Step 2: Convert to fraction form
    13,988.64/19,303.92 = 7,700.88/x
  3. Step 3: Cross multiply
    13,988.64x = 19,303.92 × 7,700.88
  4. Step 4: Simplify right side
    13,988.64x = 148,657,171.45
  5. Step 5: Solve for x
    x = 148,657,171.45/13,988.64
  6. Step 6: Final answer
    x = 10,626.99

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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.