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Finding the Fourth Proportional to 13,312.80, 19,953.54 and 10,015.20

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Solution

The fourth proportional to 13,312.80, 19,953.54 and 10,015.20 is: 15,011.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,312.80 : 19,953.54 = 10,015.20 : x
  2. Step 2: Convert to fraction form
    13,312.80/19,953.54 = 10,015.20/x
  3. Step 3: Cross multiply
    13,312.80x = 19,953.54 × 10,015.20
  4. Step 4: Simplify right side
    13,312.80x = 199,838,693.81
  5. Step 5: Solve for x
    x = 199,838,693.81/13,312.80
  6. Step 6: Final answer
    x = 15,011.02

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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.