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Finding the Fourth Proportional to 7,985,643.60, 11,978,465.40 and 4,789,124.40

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Solution

The fourth proportional to 7,985,643.60, 11,978,465.40 and 4,789,124.40 is: 7,183,686.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985,643.60 : 11,978,465.40 = 4,789,124.40 : x
  2. Step 2: Convert to fraction form
    7,985,643.60/11,978,465.40 = 4,789,124.40/x
  3. Step 3: Cross multiply
    7,985,643.60x = 11,978,465.40 × 4,789,124.40
  4. Step 4: Simplify right side
    7,985,643.60x = 57,366,360,921,695.77
  5. Step 5: Solve for x
    x = 57,366,360,921,695.77/7,985,643.60
  6. Step 6: Final answer
    x = 7,183,686.60

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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.