Home / 20,434,128.90-28,205,931.15-12,176,781.45

Finding the Fourth Proportional to 20,434,128.90, 28,205,931.15 and 12,176,781.45

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Solution

The fourth proportional to 20,434,128.90, 28,205,931.15 and 12,176,781.45 is: 16,808,030.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434,128.90 : 28,205,931.15 = 12,176,781.45 : x
  2. Step 2: Convert to fraction form
    20,434,128.90/28,205,931.15 = 12,176,781.45/x
  3. Step 3: Cross multiply
    20,434,128.90x = 28,205,931.15 × 12,176,781.45
  4. Step 4: Simplify right side
    20,434,128.90x = 343,457,459,207,297.12
  5. Step 5: Solve for x
    x = 343,457,459,207,297.12/20,434,128.90
  6. Step 6: Final answer
    x = 16,808,030.37

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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.