Home / 12,985,931.37-17,921,112.81-7,184,618.64

Finding the Fourth Proportional to 12,985,931.37, 17,921,112.81 and 7,184,618.64

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Solution

The fourth proportional to 12,985,931.37, 17,921,112.81 and 7,184,618.64 is: 9,915,065.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985,931.37 : 17,921,112.81 = 7,184,618.64 : x
  2. Step 2: Convert to fraction form
    12,985,931.37/17,921,112.81 = 7,184,618.64/x
  3. Step 3: Cross multiply
    12,985,931.37x = 17,921,112.81 × 7,184,618.64
  4. Step 4: Simplify right side
    12,985,931.37x = 128,756,361,144,268.77
  5. Step 5: Solve for x
    x = 128,756,361,144,268.77/12,985,931.37
  6. Step 6: Final answer
    x = 9,915,065.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.