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Finding the Fourth Proportional to 19,271.80, 28,886.10 and 9,908.20

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Solution

The fourth proportional to 19,271.80, 28,886.10 and 9,908.20 is: 14,851.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,271.80 : 28,886.10 = 9,908.20 : x
  2. Step 2: Convert to fraction form
    19,271.80/28,886.10 = 9,908.20/x
  3. Step 3: Cross multiply
    19,271.80x = 28,886.10 × 9,908.20
  4. Step 4: Simplify right side
    19,271.80x = 286,209,256.02
  5. Step 5: Solve for x
    x = 286,209,256.02/19,271.80
  6. Step 6: Final answer
    x = 14,851.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.