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Finding the Fourth Proportional to 7,925.76, 11,888.64 and 5,320.80

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Solution

The fourth proportional to 7,925.76, 11,888.64 and 5,320.80 is: 7,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,925.76 : 11,888.64 = 5,320.80 : x
  2. Step 2: Convert to fraction form
    7,925.76/11,888.64 = 5,320.80/x
  3. Step 3: Cross multiply
    7,925.76x = 11,888.64 × 5,320.80
  4. Step 4: Simplify right side
    7,925.76x = 63,257,075.71
  5. Step 5: Solve for x
    x = 63,257,075.71/7,925.76
  6. Step 6: Final answer
    x = 7,981.20

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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.