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Finding the Fourth Proportional to 13,602.79, 20,415.12 and 7,030.90

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Solution

The fourth proportional to 13,602.79, 20,415.12 and 7,030.90 is: 10,552.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,602.79 : 20,415.12 = 7,030.90 : x
  2. Step 2: Convert to fraction form
    13,602.79/20,415.12 = 7,030.90/x
  3. Step 3: Cross multiply
    13,602.79x = 20,415.12 × 7,030.90
  4. Step 4: Simplify right side
    13,602.79x = 143,536,667.21
  5. Step 5: Solve for x
    x = 143,536,667.21/13,602.79
  6. Step 6: Final answer
    x = 10,552.00

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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.