Finding the Fourth Proportional to 20,804,988.60, 31,207,482.90 and 12,742,831.80
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Solution
The fourth proportional to 20,804,988.60, 31,207,482.90 and 12,742,831.80 is: 19,114,247.70
Step by Step Solution
- Step 1: Write the proportion equation
20,804,988.60 : 31,207,482.90 = 12,742,831.80 : x - Step 2: Convert to fraction form
20,804,988.60/31,207,482.90 = 12,742,831.80/x - Step 3: Cross multiply
20,804,988.60x = 31,207,482.90 × 12,742,831.80 - Step 4: Simplify right side
20,804,988.60x = 397,671,705,496,076.25 - Step 5: Solve for x
x = 397,671,705,496,076.25/20,804,988.60 - Step 6: Final answer
x = 19,114,247.70
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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.