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Finding the Fourth Proportional to 25,655.20, 38,482.80 and 15,762.40

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Solution

The fourth proportional to 25,655.20, 38,482.80 and 15,762.40 is: 23,643.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,655.20 : 38,482.80 = 15,762.40 : x
  2. Step 2: Convert to fraction form
    25,655.20/38,482.80 = 15,762.40/x
  3. Step 3: Cross multiply
    25,655.20x = 38,482.80 × 15,762.40
  4. Step 4: Simplify right side
    25,655.20x = 606,581,286.72
  5. Step 5: Solve for x
    x = 606,581,286.72/25,655.20
  6. Step 6: Final answer
    x = 23,643.60

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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.